20712716 has 12 divisors (see below), whose sum is σ = 36430800. Its totient is φ = 10303920.

The previous prime is 20712709. The next prime is 20712751. The reversal of 20712716 is 61721702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12215 + ... + 13806.

It is an arithmetic number, because the mean of its divisors is an integer number (3035900).

Almost surely, 2^20712716 is an apocalyptic number.

It is an amenable number.

20712716 is a deficient number, since it is larger than the sum of its proper divisors (15718084).

20712716 is a wasteful number, since it uses less digits than its factorization.

20712716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26224 (or 26222 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 20712716 is about 4551.1224989007. The cubic root of 20712716 is about 274.6285497372.

The spelling of 20712716 in words is "twenty million, seven hundred twelve thousand, seven hundred sixteen".