18394401 has 8 divisors (see below), whose sum is σ = 24779104. Its totient is φ = 12136320.

The previous prime is 18394379. The next prime is 18394403. The reversal of 18394401 is 10449381.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18394401 - 2¹⁰ = 18393377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18394403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31315 + ... + 31896.

It is an arithmetic number, because the mean of its divisors is an integer number (3097388).

Almost surely, 2^18394401 is an apocalyptic number.

It is an amenable number.

18394401 is a deficient number, since it is larger than the sum of its proper divisors (6384703).

18394401 is an equidigital number, since it uses as much as digits as its factorization.

18394401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63311.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18394401 is about 4288.8694314469. The cubic root of 18394401 is about 263.9744436923.

The spelling of 18394401 in words is "eighteen million, three hundred ninety-four thousand, four hundred one".