21495888590757 has 24 divisors (see below), whose sum is σ = 33838182238176. Its totient is φ = 12100031098848.

The previous prime is 21495888590753. The next prime is 21495888590797. The reversal of 21495888590757 is 75709588859412.

It is not a de Polignac number, because 21495888590757 - 2² = 21495888590753 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21495888590753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1091262798 + ... + 1091282495.

It is an arithmetic number, because the mean of its divisors is an integer number (1409924259924).

Almost surely, 2^{21495888590757} is an apocalyptic number.

It is an amenable number.

21495888590757 is a deficient number, since it is larger than the sum of its proper divisors (12342293647419).

21495888590757 is a wasteful number, since it uses less digits than its factorization.

21495888590757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182545377 (or 2182545370 counting only the distinct ones).

The product of its (nonzero) digits is 2032128000, while the sum is 78.

The spelling of 21495888590757 in words is "twenty-one trillion, four hundred ninety-five billion, eight hundred eighty-eight million, five hundred ninety thousand, seven hundred fifty-seven".