20173806630837 has 12 divisors (see below), whose sum is σ = 29144481219724. Its totient is φ = 13447109816640.

The previous prime is 20173806630833. The next prime is 20173806630841. The reversal of 20173806630837 is 73803660837102.

20173806630837 is a `hidden beast` number, since 2 + 0 + 173 + 80 + 66 + 308 + 37 = 666.

It is an interprime number because it is at equal distance from previous prime (20173806630833) and next prime (20173806630841).

It can be written as a sum of positive squares in 2 ways, for example, as 12984592455396 + 7189214175441 = 3603414^2 + 2681271^2 .

It is not a de Polignac number, because 20173806630837 - 2² = 20173806630833 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 (20173806630833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174489328 + ... + 174604905.

Almost surely, 2^{20173806630837} is an apocalyptic number.

It is an amenable number.

20173806630837 is a deficient number, since it is larger than the sum of its proper divisors (8970674588887).

20173806630837 is a wasteful number, since it uses less digits than its factorization.

20173806630837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349100660 (or 349100657 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 20173806630837 in words is "twenty trillion, one hundred seventy-three billion, eight hundred six million, six hundred thirty thousand, eight hundred thirty-seven".