20331998 has 8 divisors (see below), whose sum is σ = 30674808. Its totient is φ = 10107064.

The previous prime is 20331989. The next prime is 20332043. The reversal of 20331998 is 89913302.

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, 29036 + ... + 29727.

It is an arithmetic number, because the mean of its divisors is an integer number (3834351).

Almost surely, 2^20331998 is an apocalyptic number.

20331998 is a deficient number, since it is larger than the sum of its proper divisors (10342810).

20331998 is a wasteful number, since it uses less digits than its factorization.

20331998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58938.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 20331998 is about 4509.1016843713. The cubic root of 20331998 is about 272.9354953219.

The spelling of 20331998 in words is "twenty million, three hundred thirty-one thousand, nine hundred ninety-eight".