20231998 has 8 divisors (see below), whose sum is σ = 31945320. Its totient is φ = 9583560.

The previous prime is 20231987. The next prime is 20232001. The reversal of 20231998 is 89913202.

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, 266173 + ... + 266248.

It is an arithmetic number, because the mean of its divisors is an integer number (3993165).

Almost surely, 2^20231998 is an apocalyptic number.

20231998 is a deficient number, since it is larger than the sum of its proper divisors (11713322).

20231998 is a wasteful number, since it uses less digits than its factorization.

20231998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532442.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 20231998 is about 4497.9993330369. Note that the first 3 decimals coincide. The cubic root of 20231998 is about 272.4872950898.

The spelling of 20231998 in words is "twenty million, two hundred thirty-one thousand, nine hundred ninety-eight".