21873117822466 has 32 divisors (see below), whose sum is σ = 35850706214400. Its totient is φ = 9981162455040.

The previous prime is 21873117822433. The next prime is 21873117822529. The reversal of 21873117822466 is 66422871137812.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 21873117822466.

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, 141379071 + ... + 141533698.

It is an arithmetic number, because the mean of its divisors is an integer number (1120334569200).

Almost surely, 2^{21873117822466} is an apocalyptic number.

21873117822466 is a deficient number, since it is larger than the sum of its proper divisors (13977588391934).

21873117822466 is a wasteful number, since it uses less digits than its factorization.

21873117822466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282912874.

The product of its digits is 10838016, while the sum is 58.

The spelling of 21873117822466 in words is "twenty-one trillion, eight hundred seventy-three billion, one hundred seventeen million, eight hundred twenty-two thousand, four hundred sixty-six".