21621334060552 has 16 divisors (see below), whose sum is σ = 40574621365200. Its totient is φ = 10801435029840.

The previous prime is 21621334060541. The next prime is 21621334060567. The reversal of 21621334060552 is 25506043312612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153990102 + ... + 1154008837.

It is an arithmetic number, because the mean of its divisors is an integer number (2535913835325).

Almost surely, 2^{21621334060552} is an apocalyptic number.

It is an amenable number.

21621334060552 is a deficient number, since it is larger than the sum of its proper divisors (18953287304648).

21621334060552 is a wasteful number, since it uses less digits than its factorization.

21621334060552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308000116 (or 2308000112 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 21621334060552 in words is "twenty-one trillion, six hundred twenty-one billion, three hundred thirty-four million, sixty thousand, five hundred fifty-two".