20446006393 has 2 divisors, whose sum is σ = 20446006394. Its totient is φ = 20446006392.

The previous prime is 20446006337. The next prime is 20446006409. The reversal of 20446006393 is 39360064402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20254128489 + 191877904 = 142317^2 + 13852^2 .

It is a cyclic number.

It is not a de Polignac number, because 20446006393 - 2²⁹ = 19909135481 is a prime.

It is not a weakly prime, because it can be changed into another prime (20446006093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10223003196 + 10223003197.

It is an arithmetic number, because the mean of its divisors is an integer number (10223003197).

Almost surely, 2^20446006393 is an apocalyptic number.

It is an amenable number.

20446006393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20446006393 is an equidigital number, since it uses as much as digits as its factorization.

20446006393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 20446006393 in words is "twenty billion, four hundred forty-six million, six thousand, three hundred ninety-three".