20431885104 has 60 divisors (see below), whose sum is σ = 57190536000. Its totient is φ = 6809480832.

The previous prime is 20431885099. The next prime is 20431885109. The reversal of 20431885104 is 40158813402.

20431885104 is a `hidden beast` number, since 20 + 43 + 1 + 88 + 510 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (20431885099) and next prime (20431885109).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20431885109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1570177 + ... + 1583135.

It is an arithmetic number, because the mean of its divisors is an integer number (953175600).

Almost surely, 2^20431885104 is an apocalyptic number.

20431885104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20431885104 is an abundant number, since it is smaller than the sum of its proper divisors (36758650896).

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

20431885104 is a wasteful number, since it uses less digits than its factorization.

20431885104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23922 (or 23913 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 20431885104 in words is "twenty billion, four hundred thirty-one million, eight hundred eighty-five thousand, one hundred four".