20976433 has 2 divisors, whose sum is σ = 20976434. Its totient is φ = 20976432.

The previous prime is 20976421. The next prime is 20976457. The reversal of 20976433 is 33467902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20223009 + 753424 = 4497^2 + 868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20976433 is a prime.

It is not a weakly prime, because it can be changed into another prime (20976413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10488216 + 10488217.

It is an arithmetic number, because the mean of its divisors is an integer number (10488217).

Almost surely, 2^20976433 is an apocalyptic number.

It is an amenable number.

20976433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20976433 is an equidigital number, since it uses as much as digits as its factorization.

20976433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 20976433 is about 4580.0036026187. The cubic root of 20976433 is about 275.7891733465.

The spelling of 20976433 in words is "twenty million, nine hundred seventy-six thousand, four hundred thirty-three".