18959201 has 6 divisors (see below), whose sum is σ = 19235106. Its totient is φ = 18687200.

The previous prime is 18959177. The next prime is 18959203. The reversal of 18959201 is 10295981.

It can be written as a sum of positive squares in only one way, i.e., 15808576 + 3150625 = 3976^2 + 1775^2 .

It is not a de Polignac number, because 18959201 - 2⁶ = 18959137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18959203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3161 + ... + 6921.

It is an arithmetic number, because the mean of its divisors is an integer number (3205851).

Almost surely, 2^18959201 is an apocalyptic number.

It is an amenable number.

18959201 is a deficient number, since it is larger than the sum of its proper divisors (275905).

18959201 is an frugal number, since it uses more digits than its factorization.

18959201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903 (or 3832 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 18959201 is about 4354.2164622352. The cubic root of 18959201 is about 266.6490312990.

The spelling of 18959201 in words is "eighteen million, nine hundred fifty-nine thousand, two hundred one".