20005150664637 has 6 divisors (see below), whose sum is σ = 28896328737822. Its totient is φ = 13336767109752.

The previous prime is 20005150664623. The next prime is 20005150664663. The reversal of 20005150664637 is 73646605150002.

20005150664637 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 5 + 1 + 5 + 0 + 6 + 6 + 4 + 637 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19941172526916 + 63978137721 = 4465554^2 + 252939^2 .

It is not a de Polignac number, because 20005150664637 - 2⁷ = 20005150664509 is a prime.

It is a super-2 number, since 2×20005150664637² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20005150664592 and 20005150664601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005150664617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111397259138 + ... + 1111397259155.

It is an arithmetic number, because the mean of its divisors is an integer number (4816054789637).

Almost surely, 2^{20005150664637} is an apocalyptic number.

It is an amenable number.

20005150664637 is a deficient number, since it is larger than the sum of its proper divisors (8891178073185).

20005150664637 is a wasteful number, since it uses less digits than its factorization.

20005150664637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222794518299 (or 2222794518296 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 20005150664637 in words is "twenty trillion, five billion, one hundred fifty million, six hundred sixty-four thousand, six hundred thirty-seven".