20368029531 has 16 divisors (see below), whose sum is σ = 27235756800. Its totient is φ = 13539528288.

The previous prime is 20368029529. The next prime is 20368029589. The reversal of 20368029531 is 13592086302.

It is not a de Polignac number, because 20368029531 - 2¹ = 20368029529 is a prime.

It is a super-2 number, since 2×20368029531² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20368029531.

It is not an unprimeable number, because it can be changed into a prime (20368029131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4672605 + ... + 4676961.

It is an arithmetic number, because the mean of its divisors is an integer number (1702234800).

Almost surely, 2^20368029531 is an apocalyptic number.

20368029531 is a deficient number, since it is larger than the sum of its proper divisors (6867727269).

20368029531 is a wasteful number, since it uses less digits than its factorization.

20368029531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8498.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 20368029531 in words is "twenty billion, three hundred sixty-eight million, twenty-nine thousand, five hundred thirty-one".