20959228 has 24 divisors (see below), whose sum is σ = 38137680. Its totient is φ = 10066560.

The previous prime is 20959163. The next prime is 20959229. The reversal of 20959228 is 82295902.

It is a happy number.

It is a hoax number, since the sum of its digits (37) 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 (20959229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32275 + ... + 32917.

It is an arithmetic number, because the mean of its divisors is an integer number (1589070).

Almost surely, 2^20959228 is an apocalyptic number.

It is an amenable number.

20959228 is a deficient number, since it is larger than the sum of its proper divisors (17178452).

20959228 is a wasteful number, since it uses less digits than its factorization.

20959228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 20959228 is about 4578.1249436860. The cubic root of 20959228 is about 275.7137513940.

The spelling of 20959228 in words is "twenty million, nine hundred fifty-nine thousand, two hundred twenty-eight".