20368220 has 12 divisors (see below), whose sum is σ = 42773304. Its totient is φ = 8147280.

The previous prime is 20368219. The next prime is 20368223. The reversal of 20368220 is 2286302.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509186 + ... + 509225.

It is an arithmetic number, because the mean of its divisors is an integer number (3564442).

Almost surely, 2^20368220 is an apocalyptic number.

20368220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20368220 is an abundant number, since it is smaller than the sum of its proper divisors (22405084).

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

20368220 is a wasteful number, since it uses less digits than its factorization.

20368220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018420 (or 1018418 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20368220 is about 4513.1164398894. The cubic root of 20368220 is about 273.0974798029.

The spelling of 20368220 in words is "twenty million, three hundred sixty-eight thousand, two hundred twenty".