18868603373 has 4 divisors (see below), whose sum is σ = 18868920828. Its totient is φ = 18868285920.

The previous prime is 18868603343. The next prime is 18868603381. The reversal of 18868603373 is 37330686881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37330686881 = 3331 ⋅11207051.

It can be written as a sum of positive squares in 2 ways, for example, as 5763390889 + 13105212484 = 75917^2 + 114478^2 .

It is a cyclic number.

It is not a de Polignac number, because 18868603373 - 2³⁴ = 1688734189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18868603343) 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, 39938 + ... + 198323.

It is an arithmetic number, because the mean of its divisors is an integer number (4717230207).

Almost surely, 2^18868603373 is an apocalyptic number.

It is an amenable number.

18868603373 is a deficient number, since it is larger than the sum of its proper divisors (317455).

18868603373 is an equidigital number, since it uses as much as digits as its factorization.

18868603373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317454.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 18868603373 in words is "eighteen billion, eight hundred sixty-eight million, six hundred three thousand, three hundred seventy-three".