18373432903 has 16 divisors (see below), whose sum is σ = 21517182720. Its totient is φ = 15363504000.

The previous prime is 18373432897. The next prime is 18373432943. The reversal of 18373432903 is 30923437381.

It is a cyclic number.

It is not a de Polignac number, because 18373432903 - 2⁹ = 18373432391 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 18373432903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18373432943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115698 + ... + 223903.

It is an arithmetic number, because the mean of its divisors is an integer number (1344823920).

Almost surely, 2^18373432903 is an apocalyptic number.

18373432903 is a deficient number, since it is larger than the sum of its proper divisors (3143749817).

18373432903 is a wasteful number, since it uses less digits than its factorization.

18373432903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339798.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 18373432903 in words is "eighteen billion, three hundred seventy-three million, four hundred thirty-two thousand, nine hundred three".