20345797 has 2 divisors, whose sum is σ = 20345798. Its totient is φ = 20345796.

The previous prime is 20345771. The next prime is 20345803. The reversal of 20345797 is 79754302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17297281 + 3048516 = 4159^2 + 1746^2 .

It is a cyclic number.

It is not a de Polignac number, because 20345797 - 2⁷ = 20345669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20345747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172898 + 10172899.

It is an arithmetic number, because the mean of its divisors is an integer number (10172899).

Almost surely, 2^20345797 is an apocalyptic number.

It is an amenable number.

20345797 is a deficient number, since it is larger than the sum of its proper divisors (1).

20345797 is an equidigital number, since it uses as much as digits as its factorization.

20345797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 20345797 is about 4510.6315522330. The cubic root of 20345797 is about 272.9972270020.

The spelling of 20345797 in words is "twenty million, three hundred forty-five thousand, seven hundred ninety-seven".