18350861 has 8 divisors (see below), whose sum is σ = 18615744. Its totient is φ = 18088000.

The previous prime is 18350833. The next prime is 18350867. The reversal of 18350861 is 16805381.

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 18350861 - 2²² = 14156557 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 (18350867) 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, 28040 + ... + 28686.

It is an arithmetic number, because the mean of its divisors is an integer number (2326968).

Almost surely, 2^18350861 is an apocalyptic number.

It is an amenable number.

18350861 is a deficient number, since it is larger than the sum of its proper divisors (264883).

18350861 is a wasteful number, since it uses less digits than its factorization.

18350861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18350861 is about 4283.7904944103. The cubic root of 18350861 is about 263.7660011406.

The spelling of 18350861 in words is "eighteen million, three hundred fifty thousand, eight hundred sixty-one".