21072326800 has 120 divisors (see below), whose sum is σ = 57925328256. Its totient is φ = 7216465920.

The previous prime is 21072326741. The next prime is 21072326819. The reversal of 21072326800 is 862327012.

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, 2731749 + ... + 2739451.

Almost surely, 2^21072326800 is an apocalyptic number.

21072326800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21072326800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28962664128).

21072326800 is an abundant number, since it is smaller than the sum of its proper divisors (36853001456).

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

21072326800 is a wasteful number, since it uses less digits than its factorization.

21072326800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8705 (or 8694 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 21072326800 in words is "twenty-one billion, seventy-two million, three hundred twenty-six thousand, eight hundred".