20638150 has 24 divisors (see below), whose sum is σ = 41341104. Its totient is φ = 7620000.

The previous prime is 20638127. The next prime is 20638171. The reversal of 20638150 is 5183602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 15226 + ... + 16525.

It is an arithmetic number, because the mean of its divisors is an integer number (1722546).

Almost surely, 2^20638150 is an apocalyptic number.

20638150 is an abundant number, since it is smaller than the sum of its proper divisors (20702954).

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

20638150 is a wasteful number, since it uses less digits than its factorization.

20638150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31776 (or 31771 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20638150 is about 4542.9230678056. The cubic root of 20638150 is about 274.2985982343.

The spelling of 20638150 in words is "twenty million, six hundred thirty-eight thousand, one hundred fifty".