20900224 has 32 divisors (see below), whose sum is σ = 41860800. Its totient is φ = 10394112.

The previous prime is 20900221. The next prime is 20900239. The reversal of 20900224 is 42200902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20900221) 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, 34129 + ... + 34735.

It is an arithmetic number, because the mean of its divisors is an integer number (1308150).

Almost surely, 2^20900224 is an apocalyptic number.

It is an amenable number.

20900224 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20900224 is an equidigital number, since it uses as much as digits as its factorization.

20900224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20900224 is about 4571.6762790031. The cubic root of 20900224 is about 275.4547802765.

The spelling of 20900224 in words is "twenty million, nine hundred thousand, two hundred twenty-four".