20198610 has 24 divisors (see below), whose sum is σ = 52516620. Its totient is φ = 5386272.

The previous prime is 20198603. The next prime is 20198611. The reversal of 20198610 is 1689102.

It can be written as a sum of positive squares in 2 ways, for example, as 17564481 + 2634129 = 4191^2 + 1623^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20198611) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 112125 + ... + 112304.

Almost surely, 2^20198610 is an apocalyptic number.

20198610 is an abundant number, since it is smaller than the sum of its proper divisors (32318010).

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

20198610 is a wasteful number, since it uses less digits than its factorization.

20198610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224442 (or 224439 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 20198610 is about 4494.2863727181. The cubic root of 20198610 is about 272.3373211892.

The spelling of 20198610 in words is "twenty million, one hundred ninety-eight thousand, six hundred ten".