20312492 has 6 divisors (see below), whose sum is σ = 35546868. Its totient is φ = 10156244.

The previous prime is 20312491. The next prime is 20312497. The reversal of 20312492 is 29421302.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (20312491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2539058 + ... + 2539065.

It is an arithmetic number, because the mean of its divisors is an integer number (5924478).

Almost surely, 2^20312492 is an apocalyptic number.

It is an amenable number.

20312492 is a deficient number, since it is larger than the sum of its proper divisors (15234376).

20312492 is a wasteful number, since it uses less digits than its factorization.

20312492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078127 (or 5078125 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20312492 is about 4506.9382068096. The cubic root of 20312492 is about 272.8481849452.

Adding to 20312492 its reverse (29421302), we get a palindrome (49733794).

The spelling of 20312492 in words is "twenty million, three hundred twelve thousand, four hundred ninety-two".