18349473 has 4 divisors (see below), whose sum is σ = 24465968. Its totient is φ = 12232980.

The previous prime is 18349439. The next prime is 18349481. The reversal of 18349473 is 37494381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18349473 - 2⁸ = 18349217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18349873) 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, 3058243 + ... + 3058248.

It is an arithmetic number, because the mean of its divisors is an integer number (6116492).

Almost surely, 2^18349473 is an apocalyptic number.

It is an amenable number.

18349473 is a deficient number, since it is larger than the sum of its proper divisors (6116495).

18349473 is an equidigital number, since it uses as much as digits as its factorization.

18349473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6116494.

The product of its digits is 72576, while the sum is 39.

The square root of 18349473 is about 4283.6284852914. The cubic root of 18349473 is about 263.7593508361.

The spelling of 18349473 in words is "eighteen million, three hundred forty-nine thousand, four hundred seventy-three".