21429253192 has 64 divisors (see below), whose sum is σ = 42927575040. Its totient is φ = 10011340800.

The previous prime is 21429253187. The next prime is 21429253201. The reversal of 21429253192 is 29135292412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 975433 + ... + 997159.

It is an arithmetic number, because the mean of its divisors is an integer number (670743360).

Almost surely, 2^21429253192 is an apocalyptic number.

It is an amenable number.

21429253192 is an abundant number, since it is smaller than the sum of its proper divisors (21498321848).

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

21429253192 is a wasteful number, since it uses less digits than its factorization.

21429253192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21902 (or 21898 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The spelling of 21429253192 in words is "twenty-one billion, four hundred twenty-nine million, two hundred fifty-three thousand, one hundred ninety-two".