18347023 has 4 divisors (see below), whose sum is σ = 18380520. Its totient is φ = 18313528.

The previous prime is 18347003. The next prime is 18347033. The reversal of 18347023 is 32074381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32074381 = 53 ⋅605177.

It is a cyclic number.

It is not a de Polignac number, because 18347023 - 2⁹ = 18346511 is a prime.

It is a super-2 number, since 2×18347023² = 673226505925058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18346982 and 18347000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18347003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15913 + ... + 17026.

It is an arithmetic number, because the mean of its divisors is an integer number (4595130).

Almost surely, 2^18347023 is an apocalyptic number.

18347023 is a deficient number, since it is larger than the sum of its proper divisors (33497).

18347023 is an equidigital number, since it uses as much as digits as its factorization.

18347023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33496.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 18347023 is about 4283.3425032327. The cubic root of 18347023 is about 263.7476113677.

The spelling of 18347023 in words is "eighteen million, three hundred forty-seven thousand, twenty-three".