20330439953 has 2 divisors, whose sum is σ = 20330439954. Its totient is φ = 20330439952.

The previous prime is 20330439919. The next prime is 20330439977. The reversal of 20330439953 is 35993403302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17836136704 + 2494303249 = 133552^2 + 49943^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330439953 - 2⁶ = 20330439889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20330439953.

It is not a weakly prime, because it can be changed into another prime (20330439253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165219976 + 10165219977.

It is an arithmetic number, because the mean of its divisors is an integer number (10165219977).

Almost surely, 2^20330439953 is an apocalyptic number.

It is an amenable number.

20330439953 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330439953 is an equidigital number, since it uses as much as digits as its factorization.

20330439953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 41.

The spelling of 20330439953 in words is "twenty billion, three hundred thirty million, four hundred thirty-nine thousand, nine hundred fifty-three".