18049533 has 16 divisors (see below), whose sum is σ = 24955392. Its totient is φ = 11592000.

The previous prime is 18049531. The next prime is 18049543. The reversal of 18049533 is 33594081.

It is not a de Polignac number, because 18049533 - 2¹ = 18049531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18049494 and 18049503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049531) 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, 38923 + ... + 39383.

It is an arithmetic number, because the mean of its divisors is an integer number (1559712).

Almost surely, 2^18049533 is an apocalyptic number.

It is an amenable number.

18049533 is a deficient number, since it is larger than the sum of its proper divisors (6905859).

18049533 is a wasteful number, since it uses less digits than its factorization.

18049533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 18049533 is about 4248.4741966970. The cubic root of 18049533 is about 262.3143140328.

The spelling of 18049533 in words is "eighteen million, forty-nine thousand, five hundred thirty-three".