20339393 has 2 divisors, whose sum is σ = 20339394. Its totient is φ = 20339392.

The previous prime is 20339377. The next prime is 20339401. The reversal of 20339393 is 39393302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18939904 + 1399489 = 4352^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 20339393 - 2⁴ = 20339377 is a prime.

It is not a weakly prime, because it can be changed into another prime (20339323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10169696 + 10169697.

It is an arithmetic number, because the mean of its divisors is an integer number (10169697).

Almost surely, 2^20339393 is an apocalyptic number.

It is an amenable number.

20339393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20339393 is an equidigital number, since it uses as much as digits as its factorization.

20339393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 32.

The square root of 20339393 is about 4509.9216179442. The cubic root of 20339393 is about 272.9685813199.

The spelling of 20339393 in words is "twenty million, three hundred thirty-nine thousand, three hundred ninety-three".