20082991 has 2 divisors, whose sum is σ = 20082992. Its totient is φ = 20082990.

The previous prime is 20082983. The next prime is 20083003. The reversal of 20082991 is 19928002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20082991 - 2³ = 20082983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20082911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10041495 + 10041496.

It is an arithmetic number, because the mean of its divisors is an integer number (10041496).

Almost surely, 2^20082991 is an apocalyptic number.

20082991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20082991 is an equidigital number, since it uses as much as digits as its factorization.

20082991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 20082991 is about 4481.4050252125. The cubic root of 20082991 is about 271.8166972528.

The spelling of 20082991 in words is "twenty million, eighty-two thousand, nine hundred ninety-one".