21752965340 has 12 divisors (see below), whose sum is σ = 45681227256. Its totient is φ = 8701186128.

The previous prime is 21752965321. The next prime is 21752965379. The reversal of 21752965340 is 4356925712.

It is a junction number, because it is equal to n+sod(n) for n = 21752965291 and 21752965300.

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, 543824114 + ... + 543824153.

It is an arithmetic number, because the mean of its divisors is an integer number (3806768938).

Almost surely, 2^21752965340 is an apocalyptic number.

21752965340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21752965340 is an abundant number, since it is smaller than the sum of its proper divisors (23928261916).

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

21752965340 is a wasteful number, since it uses less digits than its factorization.

21752965340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087648276 (or 1087648274 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 21752965340 in words is "twenty-one billion, seven hundred fifty-two million, nine hundred sixty-five thousand, three hundred forty".