21192940000 has 60 divisors (see below), whose sum is σ = 52137860544. Its totient is φ = 8477168000.

The previous prime is 21192939973. The next prime is 21192940019. The reversal of 21192940000 is 4929112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 509824 + ... + 549823.

Almost surely, 2^21192940000 is an apocalyptic number.

21192940000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21192940000 is an abundant number, since it is smaller than the sum of its proper divisors (30944920544).

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

21192940000 is an equidigital number, since it uses as much as digits as its factorization.

21192940000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059677 (or 1059654 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 21192940000 in words is "twenty-one billion, one hundred ninety-two million, nine hundred forty thousand".