20220904 has 32 divisors (see below), whose sum is σ = 42249600. Its totient is φ = 8993920.

The previous prime is 20220901. The next prime is 20220923. The reversal of 20220904 is 40902202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1692 + ... + 6580.

It is an arithmetic number, because the mean of its divisors is an integer number (1320300).

Almost surely, 2^20220904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20220904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21124800).

20220904 is an abundant number, since it is smaller than the sum of its proper divisors (22028696).

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

20220904 is a wasteful number, since it uses less digits than its factorization.

20220904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953 (or 4949 counting only the distinct ones).

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

The square root of 20220904 is about 4496.7659489905. The cubic root of 20220904 is about 272.4374808178.

The spelling of 20220904 in words is "twenty million, two hundred twenty thousand, nine hundred four".