18012061 has 8 divisors (see below), whose sum is σ = 19341504. Its totient is φ = 16712640.

The previous prime is 18012047. The next prime is 18012067. The reversal of 18012061 is 16021081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18012061 - 2²¹ = 15914909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18012067) 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, 6255 + ... + 8668.

It is an arithmetic number, because the mean of its divisors is an integer number (2417688).

Almost surely, 2^18012061 is an apocalyptic number.

It is an amenable number.

18012061 is a deficient number, since it is larger than the sum of its proper divisors (1329443).

18012061 is a wasteful number, since it uses less digits than its factorization.

18012061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15011.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 18012061 is about 4244.0618515757. The cubic root of 18012061 is about 262.1326610963.

The spelling of 18012061 in words is "eighteen million, twelve thousand, sixty-one".