18945201 has 16 divisors (see below), whose sum is σ = 27748800. Its totient is φ = 11401920.

The previous prime is 18945161. The next prime is 18945217. The reversal of 18945201 is 10254981.

It is a happy number.

It is not a de Polignac number, because 18945201 - 2¹¹ = 18943153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18945281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2991 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (1734300).

Almost surely, 2^18945201 is an apocalyptic number.

18945201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18945201 is a deficient number, since it is larger than the sum of its proper divisors (8803599).

18945201 is a wasteful number, since it uses less digits than its factorization.

18945201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18945201 is about 4352.6085282276. The cubic root of 18945201 is about 266.5833814564.

The spelling of 18945201 in words is "eighteen million, nine hundred forty-five thousand, two hundred one".