18220039569 has 24 divisors (see below), whose sum is σ = 28378677600. Its totient is φ = 11226720960.

The previous prime is 18220039517. The next prime is 18220039577. The reversal of 18220039569 is 96593002281.

18220039569 is a `hidden beast` number, since 1 + 82 + 2 + 0 + 0 + 3 + 9 + 569 = 666.

It is not a de Polignac number, because 18220039569 - 2¹⁶ = 18219974033 is a prime.

It is a super-2 number, since 2×18220039569² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18220739569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1292379 + ... + 1306400.

It is an arithmetic number, because the mean of its divisors is an integer number (1182444900).

Almost surely, 2^18220039569 is an apocalyptic number.

18220039569 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18220039569 is a deficient number, since it is larger than the sum of its proper divisors (10158638031).

18220039569 is a wasteful number, since it uses less digits than its factorization.

18220039569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598845 (or 2598842 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 18220039569 in words is "eighteen billion, two hundred twenty million, thirty-nine thousand, five hundred sixty-nine".