18121476 has 24 divisors (see below), whose sum is σ = 42414400. Its totient is φ = 6021792.

The previous prime is 18121469. The next prime is 18121517. The reversal of 18121476 is 67412181.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2025 + ... + 6351.

Almost surely, 2^18121476 is an apocalyptic number.

It is an amenable number.

18121476 is an abundant number, since it is smaller than the sum of its proper divisors (24292924).

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

18121476 is a wasteful number, since it uses less digits than its factorization.

18121476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683 (or 4681 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 18121476 is about 4256.9326985519. The cubic root of 18121476 is about 262.6623684811.

The spelling of 18121476 in words is "eighteen million, one hundred twenty-one thousand, four hundred seventy-six".