21976492033 has 2 divisors, whose sum is σ = 21976492034. Its totient is φ = 21976492032.

The previous prime is 21976492003. The next prime is 21976492091. The reversal of 21976492033 is 33029467912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11745574129 + 10230917904 = 108377^2 + 101148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21976492033 is a prime.

It is not a weakly prime, because it can be changed into another prime (21976492003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10988246016 + 10988246017.

It is an arithmetic number, because the mean of its divisors is an integer number (10988246017).

Almost surely, 2^21976492033 is an apocalyptic number.

It is an amenable number.

21976492033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21976492033 is an equidigital number, since it uses as much as digits as its factorization.

21976492033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 46.

The spelling of 21976492033 in words is "twenty-one billion, nine hundred seventy-six million, four hundred ninety-two thousand, thirty-three".