20239170 has 32 divisors (see below), whose sum is σ = 55513728. Its totient is φ = 4626048.

The previous prime is 20239169. The next prime is 20239181. The reversal of 20239170 is 7193202.

It is a self number, because there is not a number n which added to its sum of digits gives 20239170.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47979 + ... + 48398.

It is an arithmetic number, because the mean of its divisors is an integer number (1734804).

Almost surely, 2^20239170 is an apocalyptic number.

20239170 is an abundant number, since it is smaller than the sum of its proper divisors (35274558).

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

20239170 is a wasteful number, since it uses less digits than its factorization.

20239170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96394.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20239170 is about 4498.7965057335. The cubic root of 20239170 is about 272.5194891092.

The spelling of 20239170 in words is "twenty million, two hundred thirty-nine thousand, one hundred seventy".