20022904 has 16 divisors (see below), whose sum is σ = 40956120. Its totient is φ = 9101280.

The previous prime is 20022901. The next prime is 20022911. The reversal of 20022904 is 40922002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113679 + ... + 113854.

Almost surely, 2^20022904 is an apocalyptic number.

It is an amenable number.

20022904 is an abundant number, since it is smaller than the sum of its proper divisors (20933216).

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

20022904 is a wasteful number, since it uses less digits than its factorization.

20022904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227550 (or 227546 counting only the distinct ones).

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

The square root of 20022904 is about 4474.6959673256. The cubic root of 20022904 is about 271.5453404985.

Adding to 20022904 its reverse (40922002), we get a palindrome (60944906).

It can be divided in two parts, 200 and 22904, that added together give a square (23104 = 152²).

The spelling of 20022904 in words is "twenty million, twenty-two thousand, nine hundred four".