18013652 has 6 divisors (see below), whose sum is σ = 31523898. Its totient is φ = 9006824.

The previous prime is 18013651. The next prime is 18013657. The reversal of 18013652 is 25631081.

It can be written as a sum of positive squares in only one way, i.e., 18011536 + 2116 = 4244^2 + 46^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18013651) 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 as a sum of consecutive naturals, namely, 2251703 + ... + 2251710.

It is an arithmetic number, because the mean of its divisors is an integer number (5253983).

Almost surely, 2^18013652 is an apocalyptic number.

It is an amenable number.

18013652 is a deficient number, since it is larger than the sum of its proper divisors (13510246).

18013652 is a wasteful number, since it uses less digits than its factorization.

18013652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503417 (or 4503415 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 18013652 is about 4244.2492857984. The cubic root of 18013652 is about 262.1403789024.

The spelling of 18013652 in words is "eighteen million, thirteen thousand, six hundred fifty-two".