20712464 has 20 divisors (see below), whose sum is σ = 41425920. Its totient is φ = 10021920.

The previous prime is 20712449. The next prime is 20712469. The reversal of 20712464 is 46421702.

20712464 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20712469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20384 + ... + 21375.

It is an arithmetic number, because the mean of its divisors is an integer number (2071296).

Almost surely, 2^20712464 is an apocalyptic number.

It is an amenable number.

20712464 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20712464 is a wasteful number, since it uses less digits than its factorization.

20712464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41798 (or 41792 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20712464 is about 4551.0948133389. The cubic root of 20712464 is about 274.6274359822.

The spelling of 20712464 in words is "twenty million, seven hundred twelve thousand, four hundred sixty-four".