21299037232800 has 144 divisors (see below), whose sum is σ = 70464897270432. Its totient is φ = 5586632678400.

The previous prime is 21299037232789. The next prime is 21299037232813. The reversal of 21299037232800 is 823273099212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 21299037232800.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72596214 + ... + 72889013.

It is an arithmetic number, because the mean of its divisors is an integer number (489339564378).

Almost surely, 2^{21299037232800} is an apocalyptic number.

21299037232800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21299037232800 is an abundant number, since it is smaller than the sum of its proper divisors (49165860037632).

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

21299037232800 is a wasteful number, since it uses less digits than its factorization.

21299037232800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145485311 (or 145485298 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 21299037232800 in words is "twenty-one trillion, two hundred ninety-nine billion, thirty-seven million, two hundred thirty-two thousand, eight hundred".