21258740592 has 30 divisors (see below), whose sum is σ = 59494948032. Its totient is φ = 7086246816.

The previous prime is 21258740557. The next prime is 21258740603. The reversal of 21258740592 is 29504785212.

21258740592 is a `hidden beast` number, since 2 + 1 + 2 + 58 + 7 + 4 + 0 + 592 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73814928 + ... + 73815215.

Almost surely, 2^21258740592 is an apocalyptic number.

It is an amenable number.

21258740592 is an abundant number, since it is smaller than the sum of its proper divisors (38236207440).

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

21258740592 is a wasteful number, since it uses less digits than its factorization.

21258740592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147630157 (or 147630148 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 21258740592 in words is "twenty-one billion, two hundred fifty-eight million, seven hundred forty thousand, five hundred ninety-two".