18426749 has 16 divisors (see below), whose sum is σ = 21147264. Its totient is φ = 15892800.

The previous prime is 18426673. The next prime is 18426761. The reversal of 18426749 is 94762481.

It is not a de Polignac number, because 18426749 - 2²⁴ = 1649533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18426449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43559 + ... + 43979.

It is an arithmetic number, because the mean of its divisors is an integer number (1321704).

Almost surely, 2^18426749 is an apocalyptic number.

It is an amenable number.

18426749 is a deficient number, since it is larger than the sum of its proper divisors (2720515).

18426749 is a wasteful number, since it uses less digits than its factorization.

18426749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628.

The product of its digits is 96768, while the sum is 41.

The square root of 18426749 is about 4292.6389319392. The cubic root of 18426749 is about 264.1290930095.

The spelling of 18426749 in words is "eighteen million, four hundred twenty-six thousand, seven hundred forty-nine".