21996636406348 has 12 divisors (see below), whose sum is σ = 38504542919752. Its totient is φ = 10995338429280.

The previous prime is 21996636406333. The next prime is 21996636406351. The reversal of 21996636406348 is 84360463669912.

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, 744926865 + ... + 744956392.

Almost surely, 2^{21996636406348} is an apocalyptic number.

It is an amenable number.

21996636406348 is a deficient number, since it is larger than the sum of its proper divisors (16507906513404).

21996636406348 is a wasteful number, since it uses less digits than its factorization.

21996636406348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489886952 (or 1489886950 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 67.

The spelling of 21996636406348 in words is "twenty-one trillion, nine hundred ninety-six billion, six hundred thirty-six million, four hundred six thousand, three hundred forty-eight".