21373602464764 has 36 divisors (see below), whose sum is σ = 41608613220552. Its totient is φ = 9598222337440.

The previous prime is 21373602464717. The next prime is 21373602464777. The reversal of 21373602464764 is 46746420637312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 265985947 + ... + 266066290.

It is an arithmetic number, because the mean of its divisors is an integer number (1155794811682).

Almost surely, 2^{21373602464764} is an apocalyptic number.

It is an amenable number.

21373602464764 is a deficient number, since it is larger than the sum of its proper divisors (20235010755788).

21373602464764 is a wasteful number, since it uses less digits than its factorization.

21373602464764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532052346 (or 532052333 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 55.

The spelling of 21373602464764 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred two million, four hundred sixty-four thousand, seven hundred sixty-four".