23433981 has 8 divisors (see below), whose sum is σ = 31409664. Its totient is φ = 15540480.

The previous prime is 23433961. The next prime is 23433989. The reversal of 23433981 is 18933432.

It is a happy number.

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

It is not a de Polignac number, because 23433981 - 2²² = 19239677 is a prime.

It is a super-2 number, since 2×23433981² = 1098302931016722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23433989) 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, 19876 + ... + 21021.

It is an arithmetic number, because the mean of its divisors is an integer number (3926208).

Almost surely, 2^23433981 is an apocalyptic number.

It is an amenable number.

23433981 is a deficient number, since it is larger than the sum of its proper divisors (7975683).

23433981 is a wasteful number, since it uses less digits than its factorization.

23433981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41091.

The product of its digits is 15552, while the sum is 33.

The square root of 23433981 is about 4840.8657283589. The cubic root of 23433981 is about 286.1642372568.

The spelling of 23433981 in words is "twenty-three million, four hundred thirty-three thousand, nine hundred eighty-one".