Search a number
-
+
20431002301 = 151135304651
BaseRepresentation
bin10011000001110010…
…000101101010111101
31221201212112110020221
4103001302011222331
5313320314033201
613215203141341
71322204440243
oct230162055275
957655473227
1020431002301
11873484a476
123b62374851
131c07a82498
14dbb63a793
157e8a054a1
hex4c1c85abd

20431002301 has 4 divisors (see below), whose sum is σ = 20566307104. Its totient is φ = 20295697500.

The previous prime is 20431002283. The next prime is 20431002323. The reversal of 20431002301 is 10320013402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20431002301 - 25 = 20431002269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431002331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67652175 + ... + 67652476.

It is an arithmetic number, because the mean of its divisors is an integer number (5141576776).

Almost surely, 220431002301 is an apocalyptic number.

It is an amenable number.

20431002301 is a deficient number, since it is larger than the sum of its proper divisors (135304803).

20431002301 is a wasteful number, since it uses less digits than its factorization.

20431002301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135304802.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20431002301 its reverse (10320013402), we get a palindrome (30751015703).

The spelling of 20431002301 in words is "twenty billion, four hundred thirty-one million, two thousand, three hundred one".

Divisors: 1 151 135304651 20431002301