20938136 has 8 divisors (see below), whose sum is σ = 39259020. Its totient is φ = 10469064.

The previous prime is 20938117. The next prime is 20938193. The reversal of 20938136 is 63183902.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1308626 + ... + 1308641.

Almost surely, 2^20938136 is an apocalyptic number.

It is an amenable number.

20938136 is a deficient number, since it is larger than the sum of its proper divisors (18320884).

20938136 is a wasteful number, since it uses less digits than its factorization.

20938136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617273 (or 2617269 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20938136 is about 4575.8208006870. The cubic root of 20938136 is about 275.6212335738.

The spelling of 20938136 in words is "twenty million, nine hundred thirty-eight thousand, one hundred thirty-six".