20532791 has 2 divisors, whose sum is σ = 20532792. Its totient is φ = 20532790.

The previous prime is 20532769. The next prime is 20532793. The reversal of 20532791 is 19723502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20532791 - 2⁶ = 20532727 is a prime.

Together with 20532793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20532793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10266395 + 10266396.

It is an arithmetic number, because the mean of its divisors is an integer number (10266396).

Almost surely, 2^20532791 is an apocalyptic number.

20532791 is a deficient number, since it is larger than the sum of its proper divisors (1).

20532791 is an equidigital number, since it uses as much as digits as its factorization.

20532791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20532791 is about 4531.3122823306. The cubic root of 20532791 is about 273.8310313833.

The spelling of 20532791 in words is "twenty million, five hundred thirty-two thousand, seven hundred ninety-one".