20431894800 has 60 divisors (see below), whose sum is σ = 65450173520. Its totient is φ = 5448504960.

The previous prime is 20431894799. The next prime is 20431894823. The reversal of 20431894800 is 849813402.

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8512090 + ... + 8514489.

Almost surely, 2^20431894800 is an apocalyptic number.

20431894800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20431894800 is an abundant number, since it is smaller than the sum of its proper divisors (45018278720).

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

20431894800 is a wasteful number, since it uses less digits than its factorization.

20431894800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17026600 (or 17026589 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 20431894800 in words is "twenty billion, four hundred thirty-one million, eight hundred ninety-four thousand, eight hundred".