20625222 has 32 divisors (see below), whose sum is σ = 43660800. Its totient is φ = 6477408.

The previous prime is 20625217. The next prime is 20625239. The reversal of 20625222 is 22252602.

It is a congruent number.

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, 26868 + ... + 27624.

It is an arithmetic number, because the mean of its divisors is an integer number (1364400).

Almost surely, 2^20625222 is an apocalyptic number.

It is a pronic number, being equal to 4541×4542.

20625222 is an abundant number, since it is smaller than the sum of its proper divisors (23035578).

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

20625222 is a wasteful number, since it uses less digits than its factorization.

20625222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20625222 is about 4541.4999724761. The cubic root of 20625222 is about 274.2413115592.

Adding to 20625222 its reverse (22252602), we get a palindrome (42877824).

The spelling of 20625222 in words is "twenty million, six hundred twenty-five thousand, two hundred twenty-two".