20330819 has 2 divisors, whose sum is σ = 20330820. Its totient is φ = 20330818.

The previous prime is 20330803. The next prime is 20330833. The reversal of 20330819 is 91803302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20330819 - 2⁴ = 20330803 is a prime.

It is a super-2 number, since 2×20330819² = 826684402421522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20330839) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165409 + 10165410.

It is an arithmetic number, because the mean of its divisors is an integer number (10165410).

Almost surely, 2^20330819 is an apocalyptic number.

20330819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330819 is an equidigital number, since it uses as much as digits as its factorization.

20330819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20330819 is about 4508.9709469013. The cubic root of 20330819 is about 272.9302196120.

The spelling of 20330819 in words is "twenty million, three hundred thirty thousand, eight hundred nineteen".