18864061 has 8 divisors (see below), whose sum is σ = 19540224. Its totient is φ = 18199440.

The previous prime is 18864047. The next prime is 18864091. The reversal of 18864061 is 16046881.

18864061 = T₅₈ + T₅₉ + ... + T₄₈₃.

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 18864061 - 2⁵ = 18864029 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 (18864091) 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, 511 + ... + 6163.

It is an arithmetic number, because the mean of its divisors is an integer number (2442528).

Almost surely, 2^18864061 is an apocalyptic number.

It is an amenable number.

18864061 is a deficient number, since it is larger than the sum of its proper divisors (676163).

18864061 is an equidigital number, since it uses as much as digits as its factorization.

18864061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5771.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18864061 is about 4343.2776793569. The cubic root of 18864061 is about 266.2022553929.

The spelling of 18864061 in words is "eighteen million, eight hundred sixty-four thousand, sixty-one".