21356147552372 has 12 divisors (see below), whose sum is σ = 37392067117440. Its totient is φ = 10672699804536.

The previous prime is 21356147552359. The next prime is 21356147552431. The reversal of 21356147552372 is 27325574165312.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1343483972 + ... + 1343499867.

It is an arithmetic number, because the mean of its divisors is an integer number (3116005593120).

Almost surely, 2^{21356147552372} is an apocalyptic number.

It is an amenable number.

21356147552372 is a deficient number, since it is larger than the sum of its proper divisors (16035919565068).

21356147552372 is a wasteful number, since it uses less digits than its factorization.

21356147552372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686985830 (or 2686985828 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 53.

The spelling of 21356147552372 in words is "twenty-one trillion, three hundred fifty-six billion, one hundred forty-seven million, five hundred fifty-two thousand, three hundred seventy-two".