20340302215949 has 2 divisors, whose sum is σ = 20340302215950. Its totient is φ = 20340302215948.

The previous prime is 20340302215873. The next prime is 20340302215993. The reversal of 20340302215949 is 94951220304302.

It is an a-pointer prime, because the next prime (20340302215993) can be obtained adding 20340302215949 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15834947869225 + 4505354346724 = 3979315^2 + 2122582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20340302215949 is a prime.

It is a super-2 number, since 2×20340302215949² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20340302214949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170151107974 + 10170151107975.

It is an arithmetic number, because the mean of its divisors is an integer number (10170151107975).

Almost surely, 2^{20340302215949} is an apocalyptic number.

It is an amenable number.

20340302215949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340302215949 is an equidigital number, since it uses as much as digits as its factorization.

20340302215949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 20340302215949 in words is "twenty trillion, three hundred forty billion, three hundred two million, two hundred fifteen thousand, nine hundred forty-nine".