18892201 has 2 divisors, whose sum is σ = 18892202. Its totient is φ = 18892200.

The previous prime is 18892199. The next prime is 18892217. The reversal of 18892201 is 10229881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17264025 + 1628176 = 4155^2 + 1276^2 .

It is an emirp because it is prime and its reverse (10229881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18892201 - 2¹ = 18892199 is a prime.

Together with 18892199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18892301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9446100 + 9446101.

It is an arithmetic number, because the mean of its divisors is an integer number (9446101).

Almost surely, 2^18892201 is an apocalyptic number.

It is an amenable number.

18892201 is a deficient number, since it is larger than the sum of its proper divisors (1).

18892201 is an equidigital number, since it uses as much as digits as its factorization.

18892201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18892201 is about 4346.5159610888. The cubic root of 18892201 is about 266.3345565227.

The spelling of 18892201 in words is "eighteen million, eight hundred ninety-two thousand, two hundred one".