21994186868482 has 16 divisors (see below), whose sum is σ = 34965564641280. Its totient is φ = 10340243869248.

The previous prime is 21994186868477. The next prime is 21994186868491. The reversal of 21994186868482 is 28486868149912.

It is a junction number, because it is equal to n+sod(n) for n = 21994186868399 and 21994186868408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311267778 + ... + 311338429.

It is an arithmetic number, because the mean of its divisors is an integer number (2185347790080).

Almost surely, 2^{21994186868482} is an apocalyptic number.

21994186868482 is a deficient number, since it is larger than the sum of its proper divisors (12971377772798).

21994186868482 is a wasteful number, since it uses less digits than its factorization.

21994186868482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622607265.

The product of its digits is 764411904, while the sum is 76.

The spelling of 21994186868482 in words is "twenty-one trillion, nine hundred ninety-four billion, one hundred eighty-six million, eight hundred sixty-eight thousand, four hundred eighty-two".