20713238 has 16 divisors (see below), whose sum is σ = 38240160. Its totient is φ = 8194176.

The previous prime is 20713219. The next prime is 20713243. The reversal of 20713238 is 83231702.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56723 + ... + 57086.

It is an arithmetic number, because the mean of its divisors is an integer number (2390010).

Almost surely, 2^20713238 is an apocalyptic number.

20713238 is a deficient number, since it is larger than the sum of its proper divisors (17526922).

20713238 is a wasteful number, since it uses less digits than its factorization.

20713238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113831.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20713238 is about 4551.1798470287. The cubic root of 20713238 is about 274.6308567725.

The spelling of 20713238 in words is "twenty million, seven hundred thirteen thousand, two hundred thirty-eight".