20307392 has 28 divisors (see below), whose sum is σ = 46055280. Its totient is φ = 8702976.

The previous prime is 20307379. The next prime is 20307403. The reversal of 20307392 is 29370302.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

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, 22217 + ... + 23112.

Almost surely, 2^20307392 is an apocalyptic number.

It is an amenable number.

20307392 is an abundant number, since it is smaller than the sum of its proper divisors (25747888).

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

20307392 is an equidigital number, since it uses as much as digits as its factorization.

20307392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45348 (or 45338 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 20307392 is about 4506.3723769791. The cubic root of 20307392 is about 272.8253477305.

Adding to 20307392 its reverse (29370302), we get a palindrome (49677694).

The spelling of 20307392 in words is "twenty million, three hundred seven thousand, three hundred ninety-two".