18921886366522 has 8 divisors (see below), whose sum is σ = 28782587712672. Its totient is φ = 9327690462300.

The previous prime is 18921886366499. The next prime is 18921886366561. The reversal of 18921886366522 is 22566368812981.

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

It is a super-2 number, since 2×18921886366522² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66626360304 + ... + 66626360587.

It is an arithmetic number, because the mean of its divisors is an integer number (3597823464084).

Almost surely, 2^{18921886366522} is an apocalyptic number.

18921886366522 is a deficient number, since it is larger than the sum of its proper divisors (9860701346150).

18921886366522 is a wasteful number, since it uses less digits than its factorization.

18921886366522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133252720964.

The product of its digits is 119439360, while the sum is 67.

The spelling of 18921886366522 in words is "eighteen trillion, nine hundred twenty-one billion, eight hundred eighty-six million, three hundred sixty-six thousand, five hundred twenty-two".