18850903 has 2 divisors, whose sum is σ = 18850904. Its totient is φ = 18850902.

The previous prime is 18850879. The next prime is 18850921. The reversal of 18850903 is 30905881.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18850903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18850933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9425451 + 9425452.

It is an arithmetic number, because the mean of its divisors is an integer number (9425452).

Almost surely, 2^18850903 is an apocalyptic number.

18850903 is a deficient number, since it is larger than the sum of its proper divisors (1).

18850903 is an equidigital number, since it uses as much as digits as its factorization.

18850903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18850903 is about 4341.7626604871. The cubic root of 18850903 is about 266.1403474791.

The spelling of 18850903 in words is "eighteen million, eight hundred fifty thousand, nine hundred three".