20746091 has 2 divisors, whose sum is σ = 20746092. Its totient is φ = 20746090.

The previous prime is 20746067. The next prime is 20746093. The reversal of 20746091 is 19064702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20746091 - 2⁶ = 20746027 is a prime.

It is a Sophie Germain prime.

Together with 20746093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20746093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10373045 + 10373046.

It is an arithmetic number, because the mean of its divisors is an integer number (10373046).

Almost surely, 2^20746091 is an apocalyptic number.

20746091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20746091 is an equidigital number, since it uses as much as digits as its factorization.

20746091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20746091 is about 4554.7877008704. The cubic root of 20746091 is about 274.7759762303.

The spelling of 20746091 in words is "twenty million, seven hundred forty-six thousand, ninety-one".