18868363 has 4 divisors (see below), whose sum is σ = 18887400. Its totient is φ = 18849328.

The previous prime is 18868361. The next prime is 18868373. The reversal of 18868363 is 36386881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36386881 = 19 ⋅1915099.

It is a cyclic number.

It is not a de Polignac number, because 18868363 - 2¹ = 18868361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18868361) 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, 7945 + ... + 10042.

It is an arithmetic number, because the mean of its divisors is an integer number (4721850).

Almost surely, 2^18868363 is an apocalyptic number.

18868363 is a deficient number, since it is larger than the sum of its proper divisors (19037).

18868363 is a wasteful number, since it uses less digits than its factorization.

18868363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19036.

The product of its digits is 165888, while the sum is 43.

The square root of 18868363 is about 4343.7728992202. The cubic root of 18868363 is about 266.2224899023. Note that the first 3 decimals are identical.

The spelling of 18868363 in words is "eighteen million, eight hundred sixty-eight thousand, three hundred sixty-three".