21637343379057 has 192 divisors, whose sum is σ = 36412795883520. Its totient is φ = 11177322444288.

The previous prime is 21637343379023. The next prime is 21637343379059. The reversal of 21637343379057 is 75097334373612.

It is not a de Polignac number, because 21637343379057 - 2¹⁰ = 21637343378033 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21637343379059) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8929979548 + ... + 8929981970.

It is an arithmetic number, because the mean of its divisors is an integer number (189649978560).

Almost surely, 2^{21637343379057} is an apocalyptic number.

It is an amenable number.

21637343379057 is a deficient number, since it is larger than the sum of its proper divisors (14775452504463).

21637343379057 is a wasteful number, since it uses less digits than its factorization.

21637343379057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084 (or 3061 counting only the distinct ones).

The product of its (nonzero) digits is 60011280, while the sum is 60.

The spelling of 21637343379057 in words is "twenty-one trillion, six hundred thirty-seven billion, three hundred forty-three million, three hundred seventy-nine thousand, fifty-seven".