18468451 has 4 divisors (see below), whose sum is σ = 18481032. Its totient is φ = 18455872.

The previous prime is 18468431. The next prime is 18468469. The reversal of 18468451 is 15486481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18468451 - 2⁵ = 18468419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18468451.

It is not an unprimeable number, because it can be changed into a prime (18468431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3745 + ... + 7138.

It is an arithmetic number, because the mean of its divisors is an integer number (4620258).

Almost surely, 2^18468451 is an apocalyptic number.

18468451 is a deficient number, since it is larger than the sum of its proper divisors (12581).

18468451 is a wasteful number, since it uses less digits than its factorization.

18468451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12580.

The product of its digits is 30720, while the sum is 37.

The square root of 18468451 is about 4297.4935718393. The cubic root of 18468451 is about 264.3281950984.

It can be divided in two parts, 184 and 68451, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 18468451 in words is "eighteen million, four hundred sixty-eight thousand, four hundred fifty-one".