18138702215922 has 32 divisors (see below), whose sum is σ = 36799196313600. Its totient is φ = 5959529526288.

The previous prime is 18138702215849. The next prime is 18138702215923. The reversal of 18138702215922 is 22951220783181.

It is a super-2 number, since 2×18138702215922² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18138702215923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32317422 + ... + 32873897.

It is an arithmetic number, because the mean of its divisors is an integer number (1149974884800).

Almost surely, 2^{18138702215922} is an apocalyptic number.

18138702215922 is an abundant number, since it is smaller than the sum of its proper divisors (18660494097678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18138702215922 is a wasteful number, since it uses less digits than its factorization.

18138702215922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65191990.

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 18138702215922 in words is "eighteen trillion, one hundred thirty-eight billion, seven hundred two million, two hundred fifteen thousand, nine hundred twenty-two".