18221880415 has 8 divisors (see below), whose sum is σ = 21880291680. Its totient is φ = 14568147552.

The previous prime is 18221880409. The next prime is 18221880419. The reversal of 18221880415 is 51408812281.

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 18221880415 - 2³ = 18221880407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18221880419) 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, 1161024 + ... + 1176613.

It is an arithmetic number, because the mean of its divisors is an integer number (2735036460).

Almost surely, 2^18221880415 is an apocalyptic number.

18221880415 is a deficient number, since it is larger than the sum of its proper divisors (3658411265).

18221880415 is a wasteful number, since it uses less digits than its factorization.

18221880415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339201.

The product of its (nonzero) digits is 40960, while the sum is 40.

The spelling of 18221880415 in words is "eighteen billion, two hundred twenty-one million, eight hundred eighty thousand, four hundred fifteen".