18103879 has 2 divisors, whose sum is σ = 18103880. Its totient is φ = 18103878.

The previous prime is 18103853. The next prime is 18103909. The reversal of 18103879 is 97830181.

It is a weak prime.

It is an emirp because it is prime and its reverse (97830181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18103879 - 2⁵ = 18103847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18103819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9051939 + 9051940.

It is an arithmetic number, because the mean of its divisors is an integer number (9051940).

Almost surely, 2^18103879 is an apocalyptic number.

18103879 is a deficient number, since it is larger than the sum of its proper divisors (1).

18103879 is an equidigital number, since it uses as much as digits as its factorization.

18103879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 18103879 is about 4254.8653327691. The cubic root of 18103879 is about 262.5773208355.

The spelling of 18103879 in words is "eighteen million, one hundred three thousand, eight hundred seventy-nine".