20439703 has 2 divisors, whose sum is σ = 20439704. Its totient is φ = 20439702.

The previous prime is 20439701. The next prime is 20439719. The reversal of 20439703 is 30793402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20439703 - 2¹ = 20439701 is a prime.

Together with 20439701, 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 (20439701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10219851 + 10219852.

It is an arithmetic number, because the mean of its divisors is an integer number (10219852).

Almost surely, 2^20439703 is an apocalyptic number.

20439703 is a deficient number, since it is larger than the sum of its proper divisors (1).

20439703 is an equidigital number, since it uses as much as digits as its factorization.

20439703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 20439703 is about 4521.0289757974. The cubic root of 20439703 is about 273.4165885918.

The spelling of 20439703 in words is "twenty million, four hundred thirty-nine thousand, seven hundred three".