18214965 has 24 divisors (see below), whose sum is σ = 32947200. Its totient is φ = 9291744.

The previous prime is 18214961. The next prime is 18214967. The reversal of 18214965 is 56941281.

It is not a de Polignac number, because 18214965 - 2² = 18214961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18214961) 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, 7765 + ... + 9834.

It is an arithmetic number, because the mean of its divisors is an integer number (1372800).

Almost surely, 2^18214965 is an apocalyptic number.

18214965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18214965 is a deficient number, since it is larger than the sum of its proper divisors (14732235).

18214965 is a wasteful number, since it uses less digits than its factorization.

18214965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17633 (or 17630 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 18214965 is about 4267.8993661988. The cubic root of 18214965 is about 263.1132871303.

It can be divided in two parts, 1821 and 4965, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 18214965 in words is "eighteen million, two hundred fourteen thousand, nine hundred sixty-five".