20638134 has 24 divisors (see below), whose sum is σ = 48781512. Its totient is φ = 6253920.

The previous prime is 20638127. The next prime is 20638171. The reversal of 20638134 is 43183602.

It is a happy number.

20638134 is a `hidden beast` number, since 20 + 638 + 1 + 3 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20638098 and 20638107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51919 + ... + 52314.

It is an arithmetic number, because the mean of its divisors is an integer number (2032563).

Almost surely, 2^20638134 is an apocalyptic number.

20638134 is an abundant number, since it is smaller than the sum of its proper divisors (28143378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20638134 is a wasteful number, since it uses less digits than its factorization.

20638134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104252 (or 104249 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20638134 is about 4542.9213068245. The cubic root of 20638134 is about 274.2985273497.

The spelling of 20638134 in words is "twenty million, six hundred thirty-eight thousand, one hundred thirty-four".