23081518 has 4 divisors (see below), whose sum is σ = 34622280. Its totient is φ = 11540758.

The previous prime is 23081491. The next prime is 23081519. The reversal of 23081518 is 81518032.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23081519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5770378 + ... + 5770381.

It is an arithmetic number, because the mean of its divisors is an integer number (8655570).

Almost surely, 2^23081518 is an apocalyptic number.

23081518 is a deficient number, since it is larger than the sum of its proper divisors (11540762).

23081518 is a wasteful number, since it uses less digits than its factorization.

23081518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11540761.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 23081518 is about 4804.3228451052. The cubic root of 23081518 is about 284.7222820462.

The spelling of 23081518 in words is "twenty-three million, eighty-one thousand, five hundred eighteen".