Search a number
-
+
20729145270 = 235690971509
BaseRepresentation
bin10011010011100011…
…011010011110110110
31222111122112200112010
4103103203122132312
5314423130122040
613304533305050
71332454553601
oct232343323666
958448480463
1020729145270
118878075719
124026195186
131c5477cc42
141009089338
15814c98e80
hex4d38da7b6

20729145270 has 16 divisors (see below), whose sum is σ = 49749948720. Its totient is φ = 5527772064.

The previous prime is 20729145263. The next prime is 20729145289. The reversal of 20729145270 is 7254192702.

20729145270 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345485725 + ... + 345485784.

It is an arithmetic number, because the mean of its divisors is an integer number (3109371795).

Almost surely, 220729145270 is an apocalyptic number.

20729145270 is an abundant number, since it is smaller than the sum of its proper divisors (29020803450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20729145270 is a wasteful number, since it uses less digits than its factorization.

20729145270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690971519.

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 20729145270 in words is "twenty billion, seven hundred twenty-nine million, one hundred forty-five thousand, two hundred seventy".

Divisors: 1 2 3 5 6 10 15 30 690971509 1381943018 2072914527 3454857545 4145829054 6909715090 10364572635 20729145270