20402900039904 has 24 divisors (see below), whose sum is σ = 53557612605000. Its totient is φ = 6800966679936.

The previous prime is 20402900039891. The next prime is 20402900039909. The reversal of 20402900039904 is 40993000920402.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402900039909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106265104279 + ... + 106265104470.

It is an arithmetic number, because the mean of its divisors is an integer number (2231567191875).

Almost surely, 2^{20402900039904} is an apocalyptic number.

20402900039904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20402900039904 is an abundant number, since it is smaller than the sum of its proper divisors (33154712565096).

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

20402900039904 is a wasteful number, since it uses less digits than its factorization.

20402900039904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212530208762 (or 212530208754 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 20402900039904 in words is "twenty trillion, four hundred two billion, nine hundred million, thirty-nine thousand, nine hundred four".