20872198 has 16 divisors (see below), whose sum is σ = 32210640. Its totient is φ = 10137600.

The previous prime is 20872193. The next prime is 20872211. The reversal of 20872198 is 89127802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20872193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26758 + ... + 27526.

It is an arithmetic number, because the mean of its divisors is an integer number (2013165).

Almost surely, 2^20872198 is an apocalyptic number.

20872198 is a deficient number, since it is larger than the sum of its proper divisors (11338442).

20872198 is a wasteful number, since it uses less digits than its factorization.

20872198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 20872198 is about 4568.6100730966. The cubic root of 20872198 is about 275.3316021886.

The spelling of 20872198 in words is "twenty million, eight hundred seventy-two thousand, one hundred ninety-eight".