21426876676 has 12 divisors (see below), whose sum is σ = 38204525772. Its totient is φ = 10511297888.

The previous prime is 21426876649. The next prime is 21426876739. The reversal of 21426876676 is 67667862412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8425404100 + 13001472576 = 91790^2 + 114024^2 .

It is a super-2 number, since 2×21426876676² (a number of 21 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, 50534875 + ... + 50535298.

It is an arithmetic number, because the mean of its divisors is an integer number (3183710481).

Almost surely, 2^21426876676 is an apocalyptic number.

It is an amenable number.

21426876676 is a deficient number, since it is larger than the sum of its proper divisors (16777649096).

21426876676 is a wasteful number, since it uses less digits than its factorization.

21426876676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101070230 (or 101070228 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 55.

The spelling of 21426876676 in words is "twenty-one billion, four hundred twenty-six million, eight hundred seventy-six thousand, six hundred seventy-six".