18032473 has 2 divisors, whose sum is σ = 18032474. Its totient is φ = 18032472.

The previous prime is 18032471. The next prime is 18032479. The reversal of 18032473 is 37423081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16064064 + 1968409 = 4008^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 18032473 - 2¹ = 18032471 is a prime.

Together with 18032471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18032471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9016236 + 9016237.

It is an arithmetic number, because the mean of its divisors is an integer number (9016237).

Almost surely, 2^18032473 is an apocalyptic number.

It is an amenable number.

18032473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18032473 is an equidigital number, since it uses as much as digits as its factorization.

18032473 is an evil number, because the sum of its binary digits is even.

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

The square root of 18032473 is about 4246.4659424043. The cubic root of 18032473 is about 262.2316435125.

The spelling of 18032473 in words is "eighteen million, thirty-two thousand, four hundred seventy-three".