21512768300 has 36 divisors (see below), whose sum is σ = 46690032480. Its totient is φ = 8603757120.

The previous prime is 21512768287. The next prime is 21512768309. The reversal of 21512768300 is 386721512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21512768309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 840086 + ... + 865314.

Almost surely, 2^21512768300 is an apocalyptic number.

21512768300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21512768300 is an abundant number, since it is smaller than the sum of its proper divisors (25177264180).

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

21512768300 is a wasteful number, since it uses less digits than its factorization.

21512768300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33770 (or 33763 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 21512768300 in words is "twenty-one billion, five hundred twelve million, seven hundred sixty-eight thousand, three hundred".