18149732 has 6 divisors (see below), whose sum is σ = 31762038. Its totient is φ = 9074864.

The previous prime is 18149713. The next prime is 18149743. The reversal of 18149732 is 23794181.

It can be written as a sum of positive squares in only one way, i.e., 16859236 + 1290496 = 4106^2 + 1136^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18149692 and 18149701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2268713 + ... + 2268720.

It is an arithmetic number, because the mean of its divisors is an integer number (5293673).

Almost surely, 2^18149732 is an apocalyptic number.

It is an amenable number.

18149732 is a deficient number, since it is larger than the sum of its proper divisors (13612306).

18149732 is a wasteful number, since it uses less digits than its factorization.

18149732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4537437 (or 4537435 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 18149732 is about 4260.2502273928. The cubic root of 18149732 is about 262.7988167802.

It can be divided in two parts, 18149 and 732, that added together give a palindrome (18881).

The spelling of 18149732 in words is "eighteen million, one hundred forty-nine thousand, seven hundred thirty-two".