18506061 has 24 divisors (see below), whose sum is σ = 30760704. Its totient is φ = 10501920.

The previous prime is 18506029. The next prime is 18506071. The reversal of 18506061 is 16060581.

18506061 is a `hidden beast` number, since 1 + 8 + 50 + 606 + 1 = 666.

It is not a de Polignac number, because 18506061 - 2⁵ = 18506029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18506021) 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, 8956 + ... + 10826.

It is an arithmetic number, because the mean of its divisors is an integer number (1281696).

Almost surely, 2^18506061 is an apocalyptic number.

It is an amenable number.

18506061 is a deficient number, since it is larger than the sum of its proper divisors (12254643).

18506061 is a wasteful number, since it uses less digits than its factorization.

18506061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 18506061 is about 4301.8671527605. The cubic root of 18506061 is about 264.5075034529.

The spelling of 18506061 in words is "eighteen million, five hundred six thousand, sixty-one".