18261061 has 8 divisors (see below), whose sum is σ = 22475264. Its totient is φ = 14448240.

The previous prime is 18261059. The next prime is 18261073. The reversal of 18261061 is 16016281.

18261061 is nontrivially palindromic in base 6.

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 18261061 - 2¹ = 18261059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18261041) 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, 100245 + ... + 100426.

It is an arithmetic number, because the mean of its divisors is an integer number (2809408).

Almost surely, 2^18261061 is an apocalyptic number.

It is an amenable number.

18261061 is a deficient number, since it is larger than the sum of its proper divisors (4214203).

18261061 is a wasteful number, since it uses less digits than its factorization.

18261061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200691.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 18261061 is about 4273.2962686900. The cubic root of 18261061 is about 263.3350508175.

The spelling of 18261061 in words is "eighteen million, two hundred sixty-one thousand, sixty-one".