18674643 has 32 divisors (see below), whose sum is σ = 28385280. Its totient is φ = 10834560.

The previous prime is 18674627. The next prime is 18674657. The reversal of 18674643 is 34647681.

It is not a de Polignac number, because 18674643 - 2⁴ = 18674627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (18674683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97678 + ... + 97868.

It is an arithmetic number, because the mean of its divisors is an integer number (887040).

Almost surely, 2^18674643 is an apocalyptic number.

18674643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18674643 is a deficient number, since it is larger than the sum of its proper divisors (9710637).

18674643 is a wasteful number, since it uses less digits than its factorization.

18674643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its digits is 96768, while the sum is 39.

The square root of 18674643 is about 4321.4167815660. The cubic root of 18674643 is about 265.3082588206.

The spelling of 18674643 in words is "eighteen million, six hundred seventy-four thousand, six hundred forty-three".