21248632966 has 16 divisors (see below), whose sum is σ = 34801883280. Its totient is φ = 9649749280.

The previous prime is 21248632943. The next prime is 21248632969. The reversal of 21248632966 is 66923684212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21248632969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411061 + ... + 459856.

It is an arithmetic number, because the mean of its divisors is an integer number (2175117705).

Almost surely, 2^21248632966 is an apocalyptic number.

21248632966 is a deficient number, since it is larger than the sum of its proper divisors (13553250314).

21248632966 is a wasteful number, since it uses less digits than its factorization.

21248632966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872039.

The product of its digits is 1492992, while the sum is 49.

The spelling of 21248632966 in words is "twenty-one billion, two hundred forty-eight million, six hundred thirty-two thousand, nine hundred sixty-six".