20359993 has 2 divisors, whose sum is σ = 20359994. Its totient is φ = 20359992.

The previous prime is 20359987. The next prime is 20360017. The reversal of 20359993 is 39995302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20358144 + 1849 = 4512^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 20359993 - 2⁵ = 20359961 is a prime.

It is not a weakly prime, because it can be changed into another prime (20359793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10179996 + 10179997.

It is an arithmetic number, because the mean of its divisors is an integer number (10179997).

Almost surely, 2^20359993 is an apocalyptic number.

It is an amenable number.

20359993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20359993 is an equidigital number, since it uses as much as digits as its factorization.

20359993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 40.

The square root of 20359993 is about 4512.2048933975. The cubic root of 20359993 is about 273.0607055939.

The spelling of 20359993 in words is "twenty million, three hundred fifty-nine thousand, nine hundred ninety-three".