18906201 has 12 divisors (see below), whose sum is σ = 27655680. Its totient is φ = 12444120.

The previous prime is 18906131. The next prime is 18906203. The reversal of 18906201 is 10260981.

It is a de Polignac number, because none of the positive numbers 2^k-18906201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18906203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12585 + ... + 14006.

It is an arithmetic number, because the mean of its divisors is an integer number (2304640).

Almost surely, 2^18906201 is an apocalyptic number.

It is an amenable number.

18906201 is a deficient number, since it is larger than the sum of its proper divisors (8749479).

18906201 is a wasteful number, since it uses less digits than its factorization.

18906201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26676 (or 26673 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 18906201 is about 4348.1261481240. The cubic root of 18906201 is about 266.4003290449.

The spelling of 18906201 in words is "eighteen million, nine hundred six thousand, two hundred one".