18354457 has 4 divisors (see below), whose sum is σ = 20023056. Its totient is φ = 16685860.

The previous prime is 18354451. The next prime is 18354467. The reversal of 18354457 is 75445381.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18354457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18354451) 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, 834283 + ... + 834304.

It is an arithmetic number, because the mean of its divisors is an integer number (5005764).

Almost surely, 2^18354457 is an apocalyptic number.

It is an amenable number.

18354457 is a deficient number, since it is larger than the sum of its proper divisors (1668599).

18354457 is a wasteful number, since it uses less digits than its factorization.

18354457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668598.

The product of its digits is 67200, while the sum is 37.

The square root of 18354457 is about 4284.2101955903. The cubic root of 18354457 is about 263.7832290442.

The spelling of 18354457 in words is "eighteen million, three hundred fifty-four thousand, four hundred fifty-seven".