18425456 has 20 divisors (see below), whose sum is σ = 40799472. Its totient is φ = 7896576.

The previous prime is 18425443. The next prime is 18425509. The reversal of 18425456 is 65452481.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82145 + ... + 82368.

Almost surely, 2^18425456 is an apocalyptic number.

18425456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18425456 is an abundant number, since it is smaller than the sum of its proper divisors (22374016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18425456 is a wasteful number, since it uses less digits than its factorization.

18425456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164528 (or 164522 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

The square root of 18425456 is about 4292.4883226399. The cubic root of 18425456 is about 264.1229149093.

It can be divided in two parts, 18425 and 456, that added together give a palindrome (18881).

The spelling of 18425456 in words is "eighteen million, four hundred twenty-five thousand, four hundred fifty-six".