20189590 has 16 divisors (see below), whose sum is σ = 38254320. Its totient is φ = 7650720.

The previous prime is 20189581. The next prime is 20189593. The reversal of 20189590 is 9598102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20189593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52941 + ... + 53320.

It is an arithmetic number, because the mean of its divisors is an integer number (2390895).

Almost surely, 2^20189590 is an apocalyptic number.

20189590 is a deficient number, since it is larger than the sum of its proper divisors (18064730).

20189590 is a wasteful number, since it uses less digits than its factorization.

20189590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106287.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 20189590 is about 4493.2827643050. The cubic root of 20189590 is about 272.2967763466.

The spelling of 20189590 in words is "twenty million, one hundred eighty-nine thousand, five hundred ninety".