21590740860436 has 24 divisors (see below), whose sum is σ = 41221589584896. Its totient is φ = 9813282049920.

The previous prime is 21590740860421. The next prime is 21590740860443. The reversal of 21590740860436 is 63406804709512.

It is a super-2 number, since 2×21590740860436² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 16644501 + ... + 17894716.

It is an arithmetic number, because the mean of its divisors is an integer number (1717566232704).

It is a 1-persistent number, because it is pandigital, but 2⋅21590740860436 = 43181481720872 is not.

Almost surely, 2^{21590740860436} is an apocalyptic number.

It is an amenable number.

21590740860436 is a deficient number, since it is larger than the sum of its proper divisors (19630848724460).

21590740860436 is a wasteful number, since it uses less digits than its factorization.

21590740860436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34553439 (or 34553437 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 21590740860436 in words is "twenty-one trillion, five hundred ninety billion, seven hundred forty million, eight hundred sixty thousand, four hundred thirty-six".