18806901 has 4 divisors (see below), whose sum is σ = 25075872. Its totient is φ = 12537932.

The previous prime is 18806897. The next prime is 18806923. The reversal of 18806901 is 10960881.

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 18806901 - 2² = 18806897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18806951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3134481 + ... + 3134486.

It is an arithmetic number, because the mean of its divisors is an integer number (6268968).

Almost surely, 2^18806901 is an apocalyptic number.

It is an amenable number.

18806901 is a deficient number, since it is larger than the sum of its proper divisors (6268971).

18806901 is an equidigital number, since it uses as much as digits as its factorization.

18806901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6268970.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 18806901 is about 4336.6924032032. The cubic root of 18806901 is about 265.9331101713.

The spelling of 18806901 in words is "eighteen million, eight hundred six thousand, nine hundred one".