18968355 has 24 divisors (see below), whose sum is σ = 37576032. Its totient is φ = 8671104.

The previous prime is 18968351. The next prime is 18968381. The reversal of 18968355 is 55386981.

It is not a de Polignac number, because 18968355 - 2² = 18968351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18968355.

It is not an unprimeable number, because it can be changed into a prime (18968351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29794 + ... + 30423.

It is an arithmetic number, because the mean of its divisors is an integer number (1565668).

Almost surely, 2^18968355 is an apocalyptic number.

18968355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18968355 is a deficient number, since it is larger than the sum of its proper divisors (18607677).

18968355 is a wasteful number, since it uses less digits than its factorization.

18968355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60235 (or 60232 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 18968355 is about 4355.2675003954. The cubic root of 18968355 is about 266.6919394450.

The spelling of 18968355 in words is "eighteen million, nine hundred sixty-eight thousand, three hundred fifty-five".