21492596899257 has 16 divisors (see below), whose sum is σ = 31338394253760. Its totient is φ = 12993968332800.

The previous prime is 21492596899231. The next prime is 21492596899259. The reversal of 21492596899257 is 75299869529412.

It is not a de Polignac number, because 21492596899257 - 2⁸ = 21492596899001 is a prime.

It is a super-2 number, since 2×21492596899257² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21492596899259) 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, 796185544 + ... + 796212537.

It is an arithmetic number, because the mean of its divisors is an integer number (1958649640860).

Almost surely, 2^{21492596899257} is an apocalyptic number.

It is an amenable number.

21492596899257 is a deficient number, since it is larger than the sum of its proper divisors (9845797354503).

21492596899257 is a wasteful number, since it uses less digits than its factorization.

21492596899257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592398504.

The product of its digits is 1763596800, while the sum is 78.

The spelling of 21492596899257 in words is "twenty-one trillion, four hundred ninety-two billion, five hundred ninety-six million, eight hundred ninety-nine thousand, two hundred fifty-seven".