21910023507408 has 40 divisors (see below), whose sum is σ = 56660662809888. Its totient is φ = 7295629072512.

The previous prime is 21910023507367. The next prime is 21910023507409. The reversal of 21910023507408 is 80470532001912.

It is a self number, because there is not a number n which added to its sum of digits gives 21910023507408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21910023507409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240957091 + ... + 241048002.

Almost surely, 2^{21910023507408} is an apocalyptic number.

It is an amenable number.

21910023507408 is an abundant number, since it is smaller than the sum of its proper divisors (34750639302480).

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

21910023507408 is a wasteful number, since it uses less digits than its factorization.

21910023507408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482006051 (or 482006045 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 21910023507408 in words is "twenty-one trillion, nine hundred ten billion, twenty-three million, five hundred seven thousand, four hundred eight".