20075985 has 16 divisors (see below), whose sum is σ = 35690880. Its totient is φ = 10707120.

The previous prime is 20075981. The next prime is 20075999. The reversal of 20075985 is 58957002.

It is not a de Polignac number, because 20075985 - 2² = 20075981 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20075981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74221 + ... + 74490.

It is an arithmetic number, because the mean of its divisors is an integer number (2230680).

Almost surely, 2^20075985 is an apocalyptic number.

It is an amenable number.

20075985 is a deficient number, since it is larger than the sum of its proper divisors (15614895).

20075985 is a wasteful number, since it uses less digits than its factorization.

20075985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148725 (or 148719 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 20075985 is about 4480.6232825356. The cubic root of 20075985 is about 271.7850856057.

The spelling of 20075985 in words is "twenty million, seventy-five thousand, nine hundred eighty-five".