20612304 has 30 divisors (see below), whose sum is σ = 57686226. Its totient is φ = 6870720.

The previous prime is 20612269. The next prime is 20612341. The reversal of 20612304 is 40321602.

It is a happy number.

20612304 is a `hidden beast` number, since 20 + 612 + 30 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 898704 = 4440^2 + 948^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71427 + ... + 71714.

Almost surely, 2^20612304 is an apocalyptic number.

20612304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20612304 is an abundant number, since it is smaller than the sum of its proper divisors (37073922).

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

20612304 is a wasteful number, since it uses less digits than its factorization.

20612304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143155 (or 143146 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20612304 is about 4540.0775323776. The cubic root of 20612304 is about 274.1840452805.

Adding to 20612304 its reverse (40321602), we get a palindrome (60933906).

The spelling of 20612304 in words is "twenty million, six hundred twelve thousand, three hundred four".