20568965 has 16 divisors (see below), whose sum is σ = 25698816. Its totient is φ = 15787200.

The previous prime is 20568959. The next prime is 20568971. The reversal of 20568965 is 56986502.

It is an interprime number because it is at equal distance from previous prime (20568959) and next prime (20568971).

It is not a de Polignac number, because 20568965 - 2⁴ = 20568949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19799 + ... + 20811.

It is an arithmetic number, because the mean of its divisors is an integer number (1606176).

Almost surely, 2^20568965 is an apocalyptic number.

It is an amenable number.

20568965 is a deficient number, since it is larger than the sum of its proper divisors (5129851).

20568965 is a wasteful number, since it uses less digits than its factorization.

20568965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 20568965 is about 4535.3020847569. The cubic root of 20568965 is about 273.9917458930.

The spelling of 20568965 in words is "twenty million, five hundred sixty-eight thousand, nine hundred sixty-five".