16773821918 has 32 divisors (see below), whose sum is σ = 29310932160. Its totient is φ = 7049952000.

The previous prime is 16773821893. The next prime is 16773821941. The reversal of 16773821918 is 81912837761.

It is a super-2 number, since 2×16773821918² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16773821918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2392418 + ... + 2399418.

It is an arithmetic number, because the mean of its divisors is an integer number (915966630).

Almost surely, 2^16773821918 is an apocalyptic number.

16773821918 is a deficient number, since it is larger than the sum of its proper divisors (12537110242).

16773821918 is a wasteful number, since it uses less digits than its factorization.

16773821918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292.

The product of its digits is 1016064, while the sum is 53.

The spelling of 16773821918 in words is "sixteen billion, seven hundred seventy-three million, eight hundred twenty-one thousand, nine hundred eighteen".