21807514056072 has 64 divisors (see below), whose sum is σ = 57611495563200. Its totient is φ = 6859787304960.

The previous prime is 21807514056071. The next prime is 21807514056079. The reversal of 21807514056072 is 27065041570812.

It is not an unprimeable number, because it can be changed into a prime (21807514056071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92924629 + ... + 93159012.

It is an arithmetic number, because the mean of its divisors is an integer number (900179618175).

Almost surely, 2^{21807514056072} is an apocalyptic number.

It is an amenable number.

21807514056072 is an abundant number, since it is smaller than the sum of its proper divisors (35803981507128).

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

21807514056072 is a wasteful number, since it uses less digits than its factorization.

21807514056072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186083926 (or 186083922 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 21807514056072 in words is "twenty-one trillion, eight hundred seven billion, five hundred fourteen million, fifty-six thousand, seventy-two".