18472291 has 2 divisors, whose sum is σ = 18472292. Its totient is φ = 18472290.

The previous prime is 18472261. The next prime is 18472367. The reversal of 18472291 is 19227481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18472291 - 2⁷ = 18472163 is a prime.

It is not a weakly prime, because it can be changed into another prime (18472261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9236145 + 9236146.

It is an arithmetic number, because the mean of its divisors is an integer number (9236146).

Almost surely, 2^18472291 is an apocalyptic number.

18472291 is a deficient number, since it is larger than the sum of its proper divisors (1).

18472291 is an equidigital number, since it uses as much as digits as its factorization.

18472291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 18472291 is about 4297.9403206652. The cubic root of 18472291 is about 264.3465137242.

The spelling of 18472291 in words is "eighteen million, four hundred seventy-two thousand, two hundred ninety-one".