18474401 has 6 divisors (see below), whose sum is σ = 20306706. Its totient is φ = 16794800.

The previous prime is 18474377. The next prime is 18474439. The reversal of 18474401 is 10447481.

It can be written as a sum of positive squares in only one way, i.e., 17472400 + 1002001 = 4180^2 + 1001^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18474401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18474601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76220 + ... + 76461.

It is an arithmetic number, because the mean of its divisors is an integer number (3384451).

Almost surely, 2^18474401 is an apocalyptic number.

18474401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18474401 is a deficient number, since it is larger than the sum of its proper divisors (1832305).

18474401 is a wasteful number, since it uses less digits than its factorization.

18474401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152703 (or 152692 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 18474401 is about 4298.1857800705. The cubic root of 18474401 is about 264.3565783467.

The spelling of 18474401 in words is "eighteen million, four hundred seventy-four thousand, four hundred one".