20745966 has 16 divisors (see below), whose sum is σ = 41652864. Its totient is φ = 6888504.

The previous prime is 20745911. The next prime is 20745971. The reversal of 20745966 is 66954702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4996 + ... + 8151.

It is an arithmetic number, because the mean of its divisors is an integer number (2603304).

Almost surely, 2^20745966 is an apocalyptic number.

20745966 is an abundant number, since it is smaller than the sum of its proper divisors (20906898).

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

20745966 is a wasteful number, since it uses less digits than its factorization.

20745966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13415.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 20745966 is about 4554.7739790246. The cubic root of 20745966 is about 274.7754243663.

The spelling of 20745966 in words is "twenty million, seven hundred forty-five thousand, nine hundred sixty-six".