20495170 has 24 divisors (see below), whose sum is σ = 38222964. Its totient is φ = 7912128.

The previous prime is 20495159. The next prime is 20495171. The reversal of 20495170 is 7159402.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 14691889 + 5803281 = 3833^2 + 2409^2 .

It is not an unprimeable number, because it can be changed into a prime (20495171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7192 + ... + 9628.

Almost surely, 2^20495170 is an apocalyptic number.

20495170 is a deficient number, since it is larger than the sum of its proper divisors (17727794).

20495170 is a wasteful number, since it uses less digits than its factorization.

20495170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502 (or 2473 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20495170 is about 4527.1591533764. The cubic root of 20495170 is about 273.6636877518.

The spelling of 20495170 in words is "twenty million, four hundred ninety-five thousand, one hundred seventy".