20444791 has 2 divisors, whose sum is σ = 20444792. Its totient is φ = 20444790.

The previous prime is 20444771. The next prime is 20444819. The reversal of 20444791 is 19744402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20444791 - 2⁵ = 20444759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20444731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222395 + 10222396.

It is an arithmetic number, because the mean of its divisors is an integer number (10222396).

Almost surely, 2^20444791 is an apocalyptic number.

20444791 is a deficient number, since it is larger than the sum of its proper divisors (1).

20444791 is an equidigital number, since it uses as much as digits as its factorization.

20444791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20444791 is about 4521.5916445429. The cubic root of 20444791 is about 273.4392736603.

The spelling of 20444791 in words is "twenty million, four hundred forty-four thousand, seven hundred ninety-one".