18464789 has 12 divisors (see below), whose sum is σ = 22274784. Its totient is φ = 14991912.

The previous prime is 18464783. The next prime is 18464819. The reversal of 18464789 is 98746481.

It is not a de Polignac number, because 18464789 - 2⁴ = 18464773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18464783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1127 + ... + 6180.

It is an arithmetic number, because the mean of its divisors is an integer number (1856232).

Almost surely, 2^18464789 is an apocalyptic number.

18464789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18464789 is a deficient number, since it is larger than the sum of its proper divisors (3809995).

18464789 is an equidigital number, since it uses as much as digits as its factorization.

18464789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352 (or 7333 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 18464789 is about 4297.0674884158. The cubic root of 18464789 is about 264.3107232516.

The spelling of 18464789 in words is "eighteen million, four hundred sixty-four thousand, seven hundred eighty-nine".