21865424600764 has 12 divisors (see below), whose sum is σ = 39498831537088. Its totient is φ = 10580044161600.

The previous prime is 21865424600753. The next prime is 21865424600807. The reversal of 21865424600764 is 46700642456812.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 88167034557 + ... + 88167034804.

Almost surely, 2^{21865424600764} is an apocalyptic number.

It is an amenable number.

21865424600764 is a deficient number, since it is larger than the sum of its proper divisors (17633406936324).

21865424600764 is a wasteful number, since it uses less digits than its factorization.

21865424600764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176334069396 (or 176334069394 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 55.

The spelling of 21865424600764 in words is "twenty-one trillion, eight hundred sixty-five billion, four hundred twenty-four million, six hundred thousand, seven hundred sixty-four".