20339743 has 2 divisors, whose sum is σ = 20339744. Its totient is φ = 20339742.

The previous prime is 20339741. The next prime is 20339749. The reversal of 20339743 is 34793302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20339743 - 2¹ = 20339741 is a prime.

Together with 20339741, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20339741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10169871 + 10169872.

It is an arithmetic number, because the mean of its divisors is an integer number (10169872).

Almost surely, 2^20339743 is an apocalyptic number.

20339743 is a deficient number, since it is larger than the sum of its proper divisors (1).

20339743 is an equidigital number, since it uses as much as digits as its factorization.

20339743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 31.

The square root of 20339743 is about 4509.9604211124. The cubic root of 20339743 is about 272.9701470575.

The spelling of 20339743 in words is "twenty million, three hundred thirty-nine thousand, seven hundred forty-three".