18015061 has 12 divisors (see below), whose sum is σ = 19287424. Its totient is φ = 16808400.

The previous prime is 18015029. The next prime is 18015073. The reversal of 18015061 is 16051081.

It is not a de Polignac number, because 18015061 - 2⁵ = 18015029 is a prime.

It is a super-3 number, since 3×18015061³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18015091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25726 + ... + 26416.

Almost surely, 2^18015061 is an apocalyptic number.

It is an amenable number.

18015061 is a deficient number, since it is larger than the sum of its proper divisors (1272363).

18015061 is an equidigital number, since it uses as much as digits as its factorization.

18015061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 18015061 is about 4244.4152718602. The cubic root of 18015061 is about 262.1472134626.

The spelling of 18015061 in words is "eighteen million, fifteen thousand, sixty-one".