20008998 has 16 divisors (see below), whose sum is σ = 44464560. Its totient is φ = 6669648.

The previous prime is 20008991. The next prime is 20008999. The reversal of 20008998 is 89980002.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20008991) 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, 185215 + ... + 185322.

It is an arithmetic number, because the mean of its divisors is an integer number (2779035).

Almost surely, 2^20008998 is an apocalyptic number.

20008998 is an abundant number, since it is smaller than the sum of its proper divisors (24455562).

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

20008998 is a wasteful number, since it uses less digits than its factorization.

20008998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370548 (or 370542 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 20008998 is about 4473.1418488575. The cubic root of 20008998 is about 271.4824627725.

The spelling of 20008998 in words is "twenty million, eight thousand, nine hundred ninety-eight".