20657612 has 12 divisors (see below), whose sum is σ = 36557640. Its totient is φ = 10212576.

The previous prime is 20657603. The next prime is 20657627. The reversal of 20657612 is 21675602.

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, 28658 + ... + 29369.

It is an arithmetic number, because the mean of its divisors is an integer number (3046470).

Almost surely, 2^20657612 is an apocalyptic number.

It is an amenable number.

20657612 is a deficient number, since it is larger than the sum of its proper divisors (15900028).

20657612 is a wasteful number, since it uses less digits than its factorization.

20657612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58120 (or 58118 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20657612 is about 4545.0645759989. The cubic root of 20657612 is about 274.3847933332.

The spelling of 20657612 in words is "twenty million, six hundred fifty-seven thousand, six hundred twelve".