20330439919 has 2 divisors, whose sum is σ = 20330439920. Its totient is φ = 20330439918.

The previous prime is 20330439917. The next prime is 20330439953. The reversal of 20330439919 is 91993403302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20330439919 - 2¹ = 20330439917 is a prime.

It is a super-2 number, since 2×20330439919² (a number of 21 digits) contains 22 as substring.

Together with 20330439917, 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 (20330439917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165219959 + 10165219960.

It is an arithmetic number, because the mean of its divisors is an integer number (10165219960).

Almost surely, 2^20330439919 is an apocalyptic number.

20330439919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330439919 is an equidigital number, since it uses as much as digits as its factorization.

20330439919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 43.

The spelling of 20330439919 in words is "twenty billion, three hundred thirty million, four hundred thirty-nine thousand, nine hundred nineteen".