18955103 has 4 divisors (see below), whose sum is σ = 19952760. Its totient is φ = 17957448.

The previous prime is 18955099. The next prime is 18955127. The reversal of 18955103 is 30155981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30155981 = 3137 ⋅9613.

It is a cyclic number.

It is not a de Polignac number, because 18955103 - 2² = 18955099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18955103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18955163) 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, 498800 + ... + 498837.

It is an arithmetic number, because the mean of its divisors is an integer number (4988190).

Almost surely, 2^18955103 is an apocalyptic number.

18955103 is a deficient number, since it is larger than the sum of its proper divisors (997657).

18955103 is an equidigital number, since it uses as much as digits as its factorization.

18955103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997656.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 18955103 is about 4353.7458584534. The cubic root of 18955103 is about 266.6298179987.

The spelling of 18955103 in words is "eighteen million, nine hundred fifty-five thousand, one hundred three".