21763282636 has 48 divisors (see below), whose sum is σ = 40175618560. Its totient is φ = 10302344640.

The previous prime is 21763282627. The next prime is 21763282637. The reversal of 21763282636 is 63628236712.

It is not an unprimeable number, because it can be changed into a prime (21763282637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1718335 + ... + 1730953.

Almost surely, 2^21763282636 is an apocalyptic number.

It is an amenable number.

21763282636 is a deficient number, since it is larger than the sum of its proper divisors (18412335924).

21763282636 is a wasteful number, since it uses less digits than its factorization.

21763282636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12974 (or 12972 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The spelling of 21763282636 in words is "twenty-one billion, seven hundred sixty-three million, two hundred eighty-two thousand, six hundred thirty-six".