20238312 has 32 divisors (see below), whose sum is σ = 50741280. Its totient is φ = 6726720.

The previous prime is 20238307. The next prime is 20238329. The reversal of 20238312 is 21383202.

It is a super-4 number, since 4×20238312⁴ (a number of 30 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

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, 9103 + ... + 11105.

It is an arithmetic number, because the mean of its divisors is an integer number (1585665).

Almost surely, 2^20238312 is an apocalyptic number.

It is an amenable number.

20238312 is an abundant number, since it is smaller than the sum of its proper divisors (30502968).

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

20238312 is a wasteful number, since it uses less digits than its factorization.

20238312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433 (or 2429 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20238312 is about 4498.7011458864. The cubic root of 20238312 is about 272.5156380779.

The spelling of 20238312 in words is "twenty million, two hundred thirty-eight thousand, three hundred twelve".