23920581 has 8 divisors (see below), whose sum is σ = 33770304. Its totient is φ = 15008960.

The previous prime is 23920553. The next prime is 23920583. The reversal of 23920581 is 18502932.

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 23920581 - 2⁷ = 23920453 is a prime.

It is a super-2 number, since 2×23920581² = 1144388390755122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23920583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234465 + ... + 234566.

It is an arithmetic number, because the mean of its divisors is an integer number (4221288).

Almost surely, 2^23920581 is an apocalyptic number.

It is an amenable number.

23920581 is a deficient number, since it is larger than the sum of its proper divisors (9849723).

23920581 is a wasteful number, since it uses less digits than its factorization.

23920581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469051.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 23920581 is about 4890.8671010364. The cubic root of 23920581 is about 288.1313901836.

The spelling of 23920581 in words is "twenty-three million, nine hundred twenty thousand, five hundred eighty-one".