20875995 has 32 divisors (see below), whose sum is σ = 42416640. Its totient is φ = 9542880.

The previous prime is 20875991. The next prime is 20876047. The reversal of 20875995 is 59957802.

It is a happy number.

It is not a de Polignac number, because 20875995 - 2² = 20875991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20875995.

It is not an unprimeable number, because it can be changed into a prime (20875991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10101 + ... + 11990.

It is an arithmetic number, because the mean of its divisors is an integer number (1325520).

Almost surely, 2^20875995 is an apocalyptic number.

20875995 is an abundant number, since it is smaller than the sum of its proper divisors (21540645).

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

20875995 is a wasteful number, since it uses less digits than its factorization.

20875995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22112 (or 22106 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 20875995 is about 4569.0256072821. The cubic root of 20875995 is about 275.3482969757.

The spelling of 20875995 in words is "twenty million, eight hundred seventy-five thousand, nine hundred ninety-five".