23315018 has 8 divisors (see below), whose sum is σ = 35632548. Its totient is φ = 11437504.

The previous prime is 23315011. The next prime is 23315021. The reversal of 23315018 is 81051332.

It can be written as a sum of positive squares in 2 ways, for example, as 22686169 + 628849 = 4763^2 + 793^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 23314984 and 23315002.

It is not an unprimeable number, because it can be changed into a prime (23315011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109871 + ... + 110082.

Almost surely, 2^23315018 is an apocalyptic number.

23315018 is a deficient number, since it is larger than the sum of its proper divisors (12317530).

23315018 is a wasteful number, since it uses less digits than its factorization.

23315018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220008.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 23315018 is about 4828.5627261122. The cubic root of 23315018 is about 285.6791763287.

It can be divided in two parts, 233 and 15018, that added together give a palindrome (15251).

The spelling of 23315018 in words is "twenty-three million, three hundred fifteen thousand, eighteen".