21423657232760 has 16 divisors (see below), whose sum is σ = 48203228773800. Its totient is φ = 8569462893088.

The previous prime is 21423657232751. The next prime is 21423657232811. The reversal of 21423657232760 is 6723275632412.

It is a junction number, because it is equal to n+sod(n) for n = 21423657232699 and 21423657232708.

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, 267795715370 + ... + 267795715449.

Almost surely, 2^{21423657232760} is an apocalyptic number.

21423657232760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21423657232760 is an abundant number, since it is smaller than the sum of its proper divisors (26779571541040).

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

21423657232760 is a wasteful number, since it uses less digits than its factorization.

21423657232760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535591430830 (or 535591430826 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 50.

The spelling of 21423657232760 in words is "twenty-one trillion, four hundred twenty-three billion, six hundred fifty-seven million, two hundred thirty-two thousand, seven hundred sixty".