21948597900 has 54 divisors (see below), whose sum is σ = 68796663572. Its totient is φ = 5852959200.

The previous prime is 21948597899. The next prime is 21948597907. The reversal of 21948597900 is 979584912.

21948597900 is a `hidden beast` number, since 2 + 1 + 9 + 48 + 597 + 9 + 0 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (21948597907) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12192766 + ... + 12194565.

Almost surely, 2^21948597900 is an apocalyptic number.

21948597900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21948597900 is an abundant number, since it is smaller than the sum of its proper divisors (46848065672).

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

21948597900 is a wasteful number, since it uses less digits than its factorization.

21948597900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24387351 (or 24387341 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 21948597900 in words is "twenty-one billion, nine hundred forty-eight million, five hundred ninety-seven thousand, nine hundred".