20792287 has 2 divisors, whose sum is σ = 20792288. Its totient is φ = 20792286.

The previous prime is 20792281. The next prime is 20792329. The reversal of 20792287 is 78229702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20792287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20792281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10396143 + 10396144.

It is an arithmetic number, because the mean of its divisors is an integer number (10396144).

Almost surely, 2^20792287 is an apocalyptic number.

20792287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20792287 is an equidigital number, since it uses as much as digits as its factorization.

20792287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 20792287 is about 4559.8560284290. The cubic root of 20792287 is about 274.9797759232.

The spelling of 20792287 in words is "twenty million, seven hundred ninety-two thousand, two hundred eighty-seven".