20312464 has 10 divisors (see below), whose sum is σ = 39355430. Its totient is φ = 10156224.

The previous prime is 20312443. The next prime is 20312483. The reversal of 20312464 is 46421302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 242064 = 4480^2 + 492^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634749 + ... + 634780.

It is an arithmetic number, because the mean of its divisors is an integer number (3935543).

Almost surely, 2^20312464 is an apocalyptic number.

It is an amenable number.

20312464 is a deficient number, since it is larger than the sum of its proper divisors (19042966).

20312464 is a wasteful number, since it uses less digits than its factorization.

20312464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269537 (or 1269531 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20312464 is about 4506.9351004868. The cubic root of 20312464 is about 272.8480595748.

Adding to 20312464 its reverse (46421302), we get a palindrome (66733766).

The spelling of 20312464 in words is "twenty million, three hundred twelve thousand, four hundred sixty-four".