18061596 has 72 divisors (see below), whose sum is σ = 54487440. Its totient is φ = 5158944.

The previous prime is 18061573. The next prime is 18061597. The reversal of 18061596 is 69516081.

18061596 is a `hidden beast` number, since 1 + 8 + 0 + 61 + 596 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18061596.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18061597) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 3586 + ... + 6998.

It is an arithmetic number, because the mean of its divisors is an integer number (756770).

Almost surely, 2^18061596 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18061596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27243720).

18061596 is an abundant number, since it is smaller than the sum of its proper divisors (36425844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18061596 is a wasteful number, since it uses less digits than its factorization.

18061596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440 (or 3425 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 18061596 is about 4249.8936457281. The cubic root of 18061596 is about 262.3727383127.

It can be divided in two parts, 180 and 61596, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 18061596 in words is "eighteen million, sixty-one thousand, five hundred ninety-six".