20215338 has 32 divisors (see below), whose sum is σ = 47500992. Its totient is φ = 5654400.

The previous prime is 20215319. The next prime is 20215343. The reversal of 20215338 is 83351202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10923 + ... + 12638.

It is an arithmetic number, because the mean of its divisors is an integer number (1484406).

Almost surely, 2^20215338 is an apocalyptic number.

20215338 is an abundant number, since it is smaller than the sum of its proper divisors (27285654).

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

20215338 is a wasteful number, since it uses less digits than its factorization.

20215338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23590.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20215338 is about 4496.1470171693. The cubic root of 20215338 is about 272.4124815040.

The spelling of 20215338 in words is "twenty million, two hundred fifteen thousand, three hundred thirty-eight".