20938242 has 16 divisors (see below), whose sum is σ = 45097920. Its totient is φ = 6442512.

The previous prime is 20938231. The next prime is 20938259. The reversal of 20938242 is 24283902.

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, 134142 + ... + 134297.

It is an arithmetic number, because the mean of its divisors is an integer number (2818620).

Almost surely, 2^20938242 is an apocalyptic number.

20938242 is an abundant number, since it is smaller than the sum of its proper divisors (24159678).

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

20938242 is a wasteful number, since it uses less digits than its factorization.

20938242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268457.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20938242 is about 4575.8323832938. The cubic root of 20938242 is about 275.6216986868.

The spelling of 20938242 in words is "twenty million, nine hundred thirty-eight thousand, two hundred forty-two".