20902198 has 8 divisors (see below), whose sum is σ = 31375080. Its totient is φ = 10443840.

The previous prime is 20902181. The next prime is 20902237. The reversal of 20902198 is 89120902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318 + ... + 6598.

It is an arithmetic number, because the mean of its divisors is an integer number (3921885).

Almost surely, 2^20902198 is an apocalyptic number.

20902198 is a deficient number, since it is larger than the sum of its proper divisors (10472882).

20902198 is a wasteful number, since it uses less digits than its factorization.

20902198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7262.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 20902198 is about 4571.8921684572. The cubic root of 20902198 is about 275.4634521233.

The spelling of 20902198 in words is "twenty million, nine hundred two thousand, one hundred ninety-eight".