20705612 has 12 divisors (see below), whose sum is σ = 37810416. Its totient is φ = 9902640.

The previous prime is 20705593. The next prime is 20705621. The reversal of 20705612 is 21650702.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 112439 + ... + 112622.

It is an arithmetic number, because the mean of its divisors is an integer number (3150868).

Almost surely, 2^20705612 is an apocalyptic number.

It is an amenable number.

20705612 is a deficient number, since it is larger than the sum of its proper divisors (17104804).

20705612 is a wasteful number, since it uses less digits than its factorization.

20705612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225088 (or 225086 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20705612 is about 4550.3419651714. The cubic root of 20705612 is about 274.5971489896.

The spelling of 20705612 in words is "twenty million, seven hundred five thousand, six hundred twelve".