21153287960892 has 72 divisors (see below), whose sum is σ = 54282295398240. Its totient is φ = 6944300912640.

The previous prime is 21153287960887. The next prime is 21153287960923. The reversal of 21153287960892 is 29806978235112.

21153287960892 is a `hidden beast` number, since 2 + 1 + 1 + 532 + 8 + 7 + 9 + 6 + 0 + 8 + 92 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2079693 + ... + 6828740.

It is an arithmetic number, because the mean of its divisors is an integer number (753920769420).

Almost surely, 2^{21153287960892} is an apocalyptic number.

It is an amenable number.

21153287960892 is an abundant number, since it is smaller than the sum of its proper divisors (33129007437348).

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

21153287960892 is a wasteful number, since it uses less digits than its factorization.

21153287960892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8909443 (or 8909438 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 21153287960892 in words is "twenty-one trillion, one hundred fifty-three billion, two hundred eighty-seven million, nine hundred sixty thousand, eight hundred ninety-two".