18773201 has 4 divisors (see below), whose sum is σ = 18908400. Its totient is φ = 18638004.

The previous prime is 18773149. The next prime is 18773213. The reversal of 18773201 is 10237781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18773201 - 2⁶ = 18773137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18773231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67391 + ... + 67668.

It is an arithmetic number, because the mean of its divisors is an integer number (4727100).

Almost surely, 2^18773201 is an apocalyptic number.

It is an amenable number.

18773201 is a deficient number, since it is larger than the sum of its proper divisors (135199).

18773201 is a wasteful number, since it uses less digits than its factorization.

18773201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135198.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 18773201 is about 4332.8052114075. The cubic root of 18773201 is about 265.7741737592.

The spelling of 18773201 in words is "eighteen million, seven hundred seventy-three thousand, two hundred one".