20331222 has 16 divisors (see below), whose sum is σ = 40710000. Its totient is φ = 6769152.

The previous prime is 20331209. The next prime is 20331253. The reversal of 20331222 is 22213302.

It is a congruent number.

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, 6138 + ... + 8850.

It is an arithmetic number, because the mean of its divisors is an integer number (2544375).

Almost surely, 2^20331222 is an apocalyptic number.

20331222 is an abundant number, since it is smaller than the sum of its proper divisors (20378778).

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

20331222 is a wasteful number, since it uses less digits than its factorization.

20331222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3967.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20331222 is about 4509.0156353688. The cubic root of 20331222 is about 272.9320229522.

Adding to 20331222 its reverse (22213302), we get a palindrome (42544524).

The spelling of 20331222 in words is "twenty million, three hundred thirty-one thousand, two hundred twenty-two".