18861059 has 8 divisors (see below), whose sum is σ = 21669888. Its totient is φ = 16080840.

The previous prime is 18861019. The next prime is 18861071. The reversal of 18861059 is 95016881.

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 18861059 - 2¹² = 18856963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18861019) 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, 5717 + ... + 8390.

It is an arithmetic number, because the mean of its divisors is an integer number (2708736).

Almost surely, 2^18861059 is an apocalyptic number.

18861059 is a deficient number, since it is larger than the sum of its proper divisors (2808829).

18861059 is a wasteful number, since it uses less digits than its factorization.

18861059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14305.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 18861059 is about 4342.9320740716. The cubic root of 18861059 is about 266.1881336269.

The spelling of 18861059 in words is "eighteen million, eight hundred sixty-one thousand, fifty-nine".