21317580762541 has 16 divisors (see below), whose sum is σ = 25797075108480. Its totient is φ = 17196702082560.

The previous prime is 21317580762481. The next prime is 21317580762557. The reversal of 21317580762541 is 14526708571312.

It is not a de Polignac number, because 21317580762541 - 2²⁹ = 21317043891629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21317580762581) 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 15 ways as a sum of consecutive naturals, for example, 450115 + ... + 6545056.

It is an arithmetic number, because the mean of its divisors is an integer number (1612317194280).

Almost surely, 2^{21317580762541} is an apocalyptic number.

It is an amenable number.

21317580762541 is a deficient number, since it is larger than the sum of its proper divisors (4479494345939).

21317580762541 is a wasteful number, since it uses less digits than its factorization.

21317580762541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020804.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 21317580762541 in words is "twenty-one trillion, three hundred seventeen billion, five hundred eighty million, seven hundred sixty-two thousand, five hundred forty-one".