18704401 has 2 divisors, whose sum is σ = 18704402. Its totient is φ = 18704400.

The previous prime is 18704393. The next prime is 18704423. The reversal of 18704401 is 10440781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17850625 + 853776 = 4225^2 + 924^2 .

It is a cyclic number.

It is not a de Polignac number, because 18704401 - 2³ = 18704393 is a prime.

It is not a weakly prime, because it can be changed into another prime (18704431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9352200 + 9352201.

It is an arithmetic number, because the mean of its divisors is an integer number (9352201).

Almost surely, 2^18704401 is an apocalyptic number.

It is an amenable number.

18704401 is a deficient number, since it is larger than the sum of its proper divisors (1).

18704401 is an equidigital number, since it uses as much as digits as its factorization.

18704401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18704401 is about 4324.8584947949. The cubic root of 18704401 is about 265.4491067304.

The spelling of 18704401 in words is "eighteen million, seven hundred four thousand, four hundred one".