20955198 has 16 divisors (see below), whose sum is σ = 45720576. Its totient is φ = 6350040.

The previous prime is 20955173. The next prime is 20955199. The reversal of 20955198 is 89155902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20955199) 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, 158686 + ... + 158817.

It is an arithmetic number, because the mean of its divisors is an integer number (2857536).

Almost surely, 2^20955198 is an apocalyptic number.

20955198 is an abundant number, since it is smaller than the sum of its proper divisors (24765378).

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

20955198 is a wasteful number, since it uses less digits than its factorization.

20955198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317519.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 20955198 is about 4577.6847860026. The cubic root of 20955198 is about 275.6960790249.

The spelling of 20955198 in words is "twenty million, nine hundred fifty-five thousand, one hundred ninety-eight".