20963287 has 2 divisors, whose sum is σ = 20963288. Its totient is φ = 20963286.

The previous prime is 20963279. The next prime is 20963339. The reversal of 20963287 is 78236902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20963287 - 2³ = 20963279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20963387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10481643 + 10481644.

It is an arithmetic number, because the mean of its divisors is an integer number (10481644).

Almost surely, 2^20963287 is an apocalyptic number.

20963287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20963287 is an equidigital number, since it uses as much as digits as its factorization.

20963287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20963287 is about 4578.5682259851. The cubic root of 20963287 is about 275.7315486443.

The spelling of 20963287 in words is "twenty million, nine hundred sixty-three thousand, two hundred eighty-seven".