20339819 has 2 divisors, whose sum is σ = 20339820. Its totient is φ = 20339818.

The previous prime is 20339807. The next prime is 20339831. The reversal of 20339819 is 91893302.

It is a balanced prime because it is at equal distance from previous prime (20339807) and next prime (20339831).

It is a cyclic number.

It is not a de Polignac number, because 20339819 - 2⁸ = 20339563 is a prime.

It is a super-2 number, since 2×20339819² = 827416473905522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20339849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10169909 + 10169910.

It is an arithmetic number, because the mean of its divisors is an integer number (10169910).

Almost surely, 2^20339819 is an apocalyptic number.

20339819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20339819 is an equidigital number, since it uses as much as digits as its factorization.

20339819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 20339819 is about 4509.9688468991. The cubic root of 20339819 is about 272.9704870438.

The spelling of 20339819 in words is "twenty million, three hundred thirty-nine thousand, eight hundred nineteen".