18611401 has 2 divisors, whose sum is σ = 18611402. Its totient is φ = 18611400.

The previous prime is 18611381. The next prime is 18611419. The reversal of 18611401 is 10411681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14100025 + 4511376 = 3755^2 + 2124^2 .

It is a cyclic number.

It is not a de Polignac number, because 18611401 - 2⁷ = 18611273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18611471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9305700 + 9305701.

It is an arithmetic number, because the mean of its divisors is an integer number (9305701).

Almost surely, 2^18611401 is an apocalyptic number.

It is an amenable number.

18611401 is a deficient number, since it is larger than the sum of its proper divisors (1).

18611401 is an equidigital number, since it uses as much as digits as its factorization.

18611401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 18611401 is about 4314.0932998719. The cubic root of 18611401 is about 265.0084297781.

The spelling of 18611401 in words is "eighteen million, six hundred eleven thousand, four hundred one".