20344602531 has 32 divisors (see below), whose sum is σ = 30799374336. Its totient is φ = 11932245600.

The previous prime is 20344602521. The next prime is 20344602547. The reversal of 20344602531 is 13520644302.

It is not a de Polignac number, because 20344602531 - 2¹³ = 20344594339 is a prime.

It is a super-2 number, since 2×20344602531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20344602521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41605 + ... + 205961.

It is an arithmetic number, because the mean of its divisors is an integer number (962480448).

Almost surely, 2^20344602531 is an apocalyptic number.

20344602531 is a deficient number, since it is larger than the sum of its proper divisors (10454771805).

20344602531 is a wasteful number, since it uses less digits than its factorization.

20344602531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164424 (or 164402 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 20344602531 in words is "twenty billion, three hundred forty-four million, six hundred two thousand, five hundred thirty-one".