18222020385 has 8 divisors (see below), whose sum is σ = 29155232640. Its totient is φ = 9718410864.

The previous prime is 18222020329. The next prime is 18222020407. The reversal of 18222020385 is 58302022281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18222020385 - 2⁹ = 18222019873 is a prime.

It is a super-2 number, since 2×18222020385² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607400665 + ... + 607400694.

It is an arithmetic number, because the mean of its divisors is an integer number (3644404080).

Almost surely, 2^18222020385 is an apocalyptic number.

18222020385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18222020385 is a deficient number, since it is larger than the sum of its proper divisors (10933212255).

18222020385 is a wasteful number, since it uses less digits than its factorization.

18222020385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214801367.

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 18222020385 in words is "eighteen billion, two hundred twenty-two million, twenty thousand, three hundred eighty-five".