18968535 has 24 divisors (see below), whose sum is σ = 33022080. Its totient is φ = 10072512.

The previous prime is 18968513. The next prime is 18968561. The reversal of 18968535 is 53586981.

It is not a de Polignac number, because 18968535 - 2⁶ = 18968471 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11322 + ... + 12888.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920).

Almost surely, 2^18968535 is an apocalyptic number.

18968535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18968535 is a deficient number, since it is larger than the sum of its proper divisors (14053545).

18968535 is a wasteful number, since it uses less digits than its factorization.

18968535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847 (or 1844 counting only the distinct ones).

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

The square root of 18968535 is about 4355.2881649783. The cubic root of 18968535 is about 266.6927830325.

It can be divided in two parts, 18968 and 535, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 18968535 in words is "eighteen million, nine hundred sixty-eight thousand, five hundred thirty-five".