23137018 has 8 divisors (see below), whose sum is σ = 34938900. Its totient is φ = 11490720.

The previous prime is 23137001. The next prime is 23137031. The reversal of 23137018 is 81073132.

It can be written as a sum of positive squares in 2 ways, for example, as 18088009 + 5049009 = 4253^2 + 2247^2 .

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 = 23136983 and 23137001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38523 + ... + 39118.

Almost surely, 2^23137018 is an apocalyptic number.

23137018 is a deficient number, since it is larger than the sum of its proper divisors (11801882).

23137018 is a wasteful number, since it uses less digits than its factorization.

23137018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77792.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 23137018 is about 4810.0954252489. The cubic root of 23137018 is about 284.9503063044.

It can be divided in two parts, 231 and 37018, that added together give a square (37249 = 193²).

The spelling of 23137018 in words is "twenty-three million, one hundred thirty-seven thousand, eighteen".