18484749 has 12 divisors (see below), whose sum is σ = 26744796. Its totient is φ = 12302592.

The previous prime is 18484733. The next prime is 18484751. The reversal of 18484749 is 94748481.

It can be written as a sum of positive squares in 2 ways, for example, as 5846724 + 12638025 = 2418^2 + 3555^2 .

It is not a de Polignac number, because 18484749 - 2⁴ = 18484733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18482749) 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, 5629 + ... + 8285.

It is an arithmetic number, because the mean of its divisors is an integer number (2228733).

Almost surely, 2^18484749 is an apocalyptic number.

It is an amenable number.

18484749 is a deficient number, since it is larger than the sum of its proper divisors (8260047).

18484749 is a wasteful number, since it uses less digits than its factorization.

18484749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436 (or 3433 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 18484749 is about 4299.3893752485. The cubic root of 18484749 is about 264.4059268349.

The spelling of 18484749 in words is "eighteen million, four hundred eighty-four thousand, seven hundred forty-nine".