20198916 has 24 divisors (see below), whose sum is σ = 52367840. Its totient is φ = 6732936.

The previous prime is 20198911. The next prime is 20198917. The reversal of 20198916 is 61989102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20198911) 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, 93406 + ... + 93621.

Almost surely, 2^20198916 is an apocalyptic number.

It is an amenable number.

20198916 is an abundant number, since it is smaller than the sum of its proper divisors (32168924).

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

20198916 is a wasteful number, since it uses less digits than its factorization.

20198916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187040 (or 187032 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 20198916 is about 4494.3204158137. The cubic root of 20198916 is about 272.3386964455.

The spelling of 20198916 in words is "twenty million, one hundred ninety-eight thousand, nine hundred sixteen".