20232989 has 8 divisors (see below), whose sum is σ = 23328960. Its totient is φ = 17188416.

The previous prime is 20232977. The next prime is 20232991. The reversal of 20232989 is 98923202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20232989 - 2⁴ = 20232973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20232959) 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, 11999 + ... + 13580.

It is an arithmetic number, because the mean of its divisors is an integer number (2916120).

Almost surely, 2^20232989 is an apocalyptic number.

It is an amenable number.

20232989 is a deficient number, since it is larger than the sum of its proper divisors (3095971).

20232989 is a wasteful number, since it uses less digits than its factorization.

20232989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25699.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 20232989 is about 4498.1094917754. The cubic root of 20232989 is about 272.4917439914.

The spelling of 20232989 in words is "twenty million, two hundred thirty-two thousand, nine hundred eighty-nine".