21393884621522 has 16 divisors (see below), whose sum is σ = 38832597296640. Its totient is φ = 8629466065728.

The previous prime is 21393884621507. The next prime is 21393884621567. The reversal of 21393884621522 is 22512648839312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44945135522 + ... + 44945135997.

It is an arithmetic number, because the mean of its divisors is an integer number (2427037331040).

Almost surely, 2^{21393884621522} is an apocalyptic number.

21393884621522 is a deficient number, since it is larger than the sum of its proper divisors (17438712675118).

21393884621522 is a wasteful number, since it uses less digits than its factorization.

21393884621522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89890271545.

The product of its digits is 9953280, while the sum is 56.

The spelling of 21393884621522 in words is "twenty-one trillion, three hundred ninety-three billion, eight hundred eighty-four million, six hundred twenty-one thousand, five hundred twenty-two".