21752077804 has 6 divisors (see below), whose sum is σ = 38066136164. Its totient is φ = 10876038900.

The previous prime is 21752077771. The next prime is 21752077877. The reversal of 21752077804 is 40877025712.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2719009722 + ... + 2719009729.

Almost surely, 2^21752077804 is an apocalyptic number.

It is an amenable number.

21752077804 is a deficient number, since it is larger than the sum of its proper divisors (16314058360).

21752077804 is a wasteful number, since it uses less digits than its factorization.

21752077804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5438019455 (or 5438019453 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 43.

The spelling of 21752077804 in words is "twenty-one billion, seven hundred fifty-two million, seventy-seven thousand, eight hundred four".