18010724 has 24 divisors (see below), whose sum is σ = 32201400. Its totient is φ = 8812800.

The previous prime is 18010723. The next prime is 18010757. The reversal of 18010724 is 42701081.

It can be written as a sum of positive squares in 4 ways, for example, as 13249600 + 4761124 = 3640^2 + 2182^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18010724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18010723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43832 + ... + 44240.

It is an arithmetic number, because the mean of its divisors is an integer number (1341725).

Almost surely, 2^18010724 is an apocalyptic number.

It is an amenable number.

18010724 is a deficient number, since it is larger than the sum of its proper divisors (14190676).

18010724 is a wasteful number, since it uses less digits than its factorization.

18010724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 18010724 is about 4243.9043344543. The cubic root of 18010724 is about 262.1261750712.

The spelling of 18010724 in words is "eighteen million, ten thousand, seven hundred twenty-four".