20422904 has 16 divisors (see below), whose sum is σ = 38367000. Its totient is φ = 10191712.

The previous prime is 20422903. The next prime is 20422921. The reversal of 20422904 is 40922402.

It is a self number, because there is not a number n which added to its sum of digits gives 20422904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2522 + ... + 6870.

Almost surely, 2^20422904 is an apocalyptic number.

It is an amenable number.

20422904 is a deficient number, since it is larger than the sum of its proper divisors (17944096).

20422904 is a wasteful number, since it uses less digits than its factorization.

20422904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942 (or 4938 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20422904 is about 4519.1707203867. The cubic root of 20422904 is about 273.3416627774.

The spelling of 20422904 in words is "twenty million, four hundred twenty-two thousand, nine hundred four".