18953191203 has 4 divisors (see below), whose sum is σ = 25270921608. Its totient is φ = 12635460800.

The previous prime is 18953191177. The next prime is 18953191223. The reversal of 18953191203 is 30219135981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18953191203 - 2⁶ = 18953191139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18953191223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3158865198 + ... + 3158865203.

It is an arithmetic number, because the mean of its divisors is an integer number (6317730402).

Almost surely, 2^18953191203 is an apocalyptic number.

18953191203 is a deficient number, since it is larger than the sum of its proper divisors (6317730405).

18953191203 is an equidigital number, since it uses as much as digits as its factorization.

18953191203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6317730404.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 18953191203 in words is "eighteen billion, nine hundred fifty-three million, one hundred ninety-one thousand, two hundred three".