18232949 has 12 divisors (see below), whose sum is σ = 21314124. Its totient is φ = 15551424.

The previous prime is 18232943. The next prime is 18232979. The reversal of 18232949 is 94923281.

It can be written as a sum of positive squares in 2 ways, for example, as 3678724 + 14554225 = 1918^2 + 3815^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18232949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18232943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10619 + ... + 12215.

It is an arithmetic number, because the mean of its divisors is an integer number (1776177).

Almost surely, 2^18232949 is an apocalyptic number.

It is an amenable number.

18232949 is a deficient number, since it is larger than the sum of its proper divisors (3081175).

18232949 is a wasteful number, since it uses less digits than its factorization.

18232949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844 (or 1837 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 18232949 is about 4270.0057377011. The cubic root of 18232949 is about 263.1998509883.

It can be divided in two parts, 182329 and 49, that multiplied together give a square (8934121 = 2989²).

The spelling of 18232949 in words is "eighteen million, two hundred thirty-two thousand, nine hundred forty-nine".