21552136700 has 36 divisors (see below), whose sum is σ = 47763213792. Its totient is φ = 8437430400.

The previous prime is 21552136687. The next prime is 21552136709. The reversal of 21552136700 is 763125512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552136709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2288081 + ... + 2297480.

Almost surely, 2^21552136700 is an apocalyptic number.

21552136700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21552136700 is an abundant number, since it is smaller than the sum of its proper divisors (26211077092).

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

21552136700 is a wasteful number, since it uses less digits than its factorization.

21552136700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585622 (or 4585615 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 21552136700 in words is "twenty-one billion, five hundred fifty-two million, one hundred thirty-six thousand, seven hundred".