20304392 has 16 divisors (see below), whose sum is σ = 40310460. Its totient is φ = 9554944.

The previous prime is 20304313. The next prime is 20304413. The reversal of 20304392 is 29340302.

It can be written as a sum of positive squares in 2 ways, for example, as 18438436 + 1865956 = 4294^2 + 1366^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74513 + ... + 74784.

Almost surely, 2^20304392 is an apocalyptic number.

It is an amenable number.

20304392 is a deficient number, since it is larger than the sum of its proper divisors (20006068).

20304392 is a wasteful number, since it uses less digits than its factorization.

20304392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149320 (or 149316 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20304392 is about 4506.0395027119. The cubic root of 20304392 is about 272.8119122887.

Adding to 20304392 its reverse (29340302), we get a palindrome (49644694).

The spelling of 20304392 in words is "twenty million, three hundred four thousand, three hundred ninety-two".