20976653 has 2 divisors, whose sum is σ = 20976654. Its totient is φ = 20976652.

The previous prime is 20976649. The next prime is 20976661. The reversal of 20976653 is 35667902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 4313929 = 4082^2 + 2077^2 .

It is a cyclic number.

It is not a de Polignac number, because 20976653 - 2² = 20976649 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20976353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10488326 + 10488327.

It is an arithmetic number, because the mean of its divisors is an integer number (10488327).

Almost surely, 2^20976653 is an apocalyptic number.

It is an amenable number.

20976653 is a deficient number, since it is larger than the sum of its proper divisors (1).

20976653 is an equidigital number, since it uses as much as digits as its factorization.

20976653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 20976653 is about 4580.0276200041. The cubic root of 20976653 is about 275.7901374984.

The spelling of 20976653 in words is "twenty million, nine hundred seventy-six thousand, six hundred fifty-three".