20008237393 has 2 divisors, whose sum is σ = 20008237394. Its totient is φ = 20008237392.

The previous prime is 20008237387. The next prime is 20008237427. The reversal of 20008237393 is 39373280002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11144391489 + 8863845904 = 105567^2 + 94148^2 .

It is a cyclic number.

It is not a de Polignac number, because 20008237393 - 2³³ = 11418302801 is a prime.

It is not a weakly prime, because it can be changed into another prime (20008237373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004118696 + 10004118697.

It is an arithmetic number, because the mean of its divisors is an integer number (10004118697).

Almost surely, 2^20008237393 is an apocalyptic number.

It is an amenable number.

20008237393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20008237393 is an equidigital number, since it uses as much as digits as its factorization.

20008237393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 20008237393 in words is "twenty billion, eight million, two hundred thirty-seven thousand, three hundred ninety-three".