23541989 has 16 divisors (see below), whose sum is σ = 25119744. Its totient is φ = 22032000.

The previous prime is 23541983. The next prime is 23542009. The reversal of 23541989 is 98914532.

It is a cyclic number.

It is not a de Polignac number, because 23541989 - 2⁸ = 23541733 is a prime.

It is a super-2 number, since 2×23541989² = 1108450492152242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23541983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228512 + ... + 228614.

It is an arithmetic number, because the mean of its divisors is an integer number (1569984).

Almost surely, 2^23541989 is an apocalyptic number.

It is an amenable number.

23541989 is a deficient number, since it is larger than the sum of its proper divisors (1577755).

23541989 is a wasteful number, since it uses less digits than its factorization.

23541989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308.

The product of its digits is 77760, while the sum is 41.

The square root of 23541989 is about 4852.0087592666. The cubic root of 23541989 is about 286.6032103700.

It can be divided in two parts, 235 and 41989, that added together give a palindrome (42224).

The spelling of 23541989 in words is "twenty-three million, five hundred forty-one thousand, nine hundred eighty-nine".