21601673515372 has 12 divisors (see below), whose sum is σ = 37802990000160. Its totient is φ = 10800819229616.

The previous prime is 21601673515339. The next prime is 21601673515391. The reversal of 21601673515372 is 27351537610612.

It is a super-3 number, since 3×21601673515372³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380703 + ... + 6716374.

It is an arithmetic number, because the mean of its divisors is an integer number (3150249166680).

Almost surely, 2^{21601673515372} is an apocalyptic number.

It is an amenable number.

21601673515372 is a deficient number, since it is larger than the sum of its proper divisors (16201316484788).

21601673515372 is a wasteful number, since it uses less digits than its factorization.

21601673515372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8764040 (or 8764038 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 21601673515372 in words is "twenty-one trillion, six hundred one billion, six hundred seventy-three million, five hundred fifteen thousand, three hundred seventy-two".