21748768404 has 48 divisors (see below), whose sum is σ = 55473417216. Its totient is φ = 6577093600.

The previous prime is 21748768397. The next prime is 21748768411. The reversal of 21748768404 is 40486784712.

It is an interprime number because it is at equal distance from previous prime (21748768397) and next prime (21748768411).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102972 + ... + 232595.

It is an arithmetic number, because the mean of its divisors is an integer number (1155696192).

Almost surely, 2^21748768404 is an apocalyptic number.

It is an amenable number.

21748768404 is an abundant number, since it is smaller than the sum of its proper divisors (33724648812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21748768404 is a wasteful number, since it uses less digits than its factorization.

21748768404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336076 (or 336074 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 51.

The spelling of 21748768404 in words is "twenty-one billion, seven hundred forty-eight million, seven hundred sixty-eight thousand, four hundred four".