18868373 has 2 divisors, whose sum is σ = 18868374. Its totient is φ = 18868372.

The previous prime is 18868361. The next prime is 18868379. The reversal of 18868373 is 37386881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18861649 + 6724 = 4343^2 + 82^2 .

It is a cyclic number.

It is not a de Polignac number, because 18868373 - 2⁶ = 18868309 is a prime.

It is a super-3 number, since 3×18868373³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18868379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9434186 + 9434187.

It is an arithmetic number, because the mean of its divisors is an integer number (9434187).

Almost surely, 2^18868373 is an apocalyptic number.

It is an amenable number.

18868373 is a deficient number, since it is larger than the sum of its proper divisors (1).

18868373 is an equidigital number, since it uses as much as digits as its factorization.

18868373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 18868373 is about 4343.7740502931. The cubic root of 18868373 is about 266.2225369339. Note that the first 3 decimals are identical.

The spelling of 18868373 in words is "eighteen million, eight hundred sixty-eight thousand, three hundred seventy-three".