20198504 has 16 divisors (see below), whose sum is σ = 38264100. Its totient is φ = 9994752.

The previous prime is 20198489. The next prime is 20198509. The reversal of 20198504 is 40589102.

It can be written as a sum of positive squares in 2 ways, for example, as 18232900 + 1965604 = 4270^2 + 1402^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20198509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12239 + ... + 13790.

Almost surely, 2^20198504 is an apocalyptic number.

It is an amenable number.

20198504 is a deficient number, since it is larger than the sum of its proper divisors (18065596).

20198504 is a wasteful number, since it uses less digits than its factorization.

20198504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26132 (or 26128 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20198504 is about 4494.2745799517. The cubic root of 20198504 is about 272.3368447900.

It can be divided in two parts, 20198 and 504, that added together give a palindrome (20702).

The spelling of 20198504 in words is "twenty million, one hundred ninety-eight thousand, five hundred four".