Search a number
-
+
20385231130 = 2511509577631
BaseRepresentation
bin10010111111000011…
…011111000100011010
31221121200102001000101
4102333003133010122
5313222104344010
613210450130014
71321110414505
oct227703370432
957550361011
1020385231130
118710a27960
123b4ab8090a
131bcb447b54
14db552413c
157e49b373a
hex4bf0df11a

20385231130 has 64 divisors (see below), whose sum is σ = 40241007360. Its totient is φ = 7373721600.

The previous prime is 20385231017. The next prime is 20385231143. The reversal of 20385231130 is 3113258302.

20385231130 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32305915 + ... + 32306545.

It is an arithmetic number, because the mean of its divisors is an integer number (628765740).

Almost surely, 220385231130 is an apocalyptic number.

20385231130 is a deficient number, since it is larger than the sum of its proper divisors (19855776230).

20385231130 is a wasteful number, since it uses less digits than its factorization.

20385231130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 20385231130 its reverse (3113258302), we get a palindrome (23498489432).

The spelling of 20385231130 in words is "twenty billion, three hundred eighty-five million, two hundred thirty-one thousand, one hundred thirty".

Divisors: 1 2 5 10 11 22 55 110 509 577 631 1018 1154 1262 2545 2885 3155 5090 5599 5770 6310 6347 6941 11198 12694 13882 27995 31735 34705 55990 63470 69410 293693 321179 364087 587386 642358 728174 1468465 1605895 1820435 2936930 3211790 3230623 3532969 3640870 4004957 6461246 7065938 8009914 16153115 17664845 20024785 32306230 35329690 40049570 185320283 370640566 926601415 1853202830 2038523113 4077046226 10192615565 20385231130