21446676351 has 24 divisors (see below), whose sum is σ = 31935206160. Its totient is φ = 13862883456.

The previous prime is 21446676343. The next prime is 21446676367. The reversal of 21446676351 is 15367664412.

21446676351 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 6 + 6 + 7 + 635 + 1 = 666.

It is not a de Polignac number, because 21446676351 - 2³ = 21446676343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21446676297 and 21446676306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446675351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237876 + ... + 315401.

It is an arithmetic number, because the mean of its divisors is an integer number (1330633590).

Almost surely, 2^21446676351 is an apocalyptic number.

21446676351 is a deficient number, since it is larger than the sum of its proper divisors (10488529809).

21446676351 is a wasteful number, since it uses less digits than its factorization.

21446676351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553415 (or 553412 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 21446676351 in words is "twenty-one billion, four hundred forty-six million, six hundred seventy-six thousand, three hundred fifty-one".