21203925112 has 16 divisors (see below), whose sum is σ = 40047561360. Its totient is φ = 10524575424.

The previous prime is 21203925103. The next prime is 21203925131. The reversal of 21203925112 is 21152930212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9672228 + ... + 9674419.

It is an arithmetic number, because the mean of its divisors is an integer number (2502972585).

Almost surely, 2^21203925112 is an apocalyptic number.

It is an amenable number.

21203925112 is a deficient number, since it is larger than the sum of its proper divisors (18843636248).

21203925112 is a wasteful number, since it uses less digits than its factorization.

21203925112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19346790 (or 19346786 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 21203925112 in words is "twenty-one billion, two hundred three million, nine hundred twenty-five thousand, one hundred twelve".