20343665111507 has 2 divisors, whose sum is σ = 20343665111508. Its totient is φ = 20343665111506.

The previous prime is 20343665111461. The next prime is 20343665111569. The reversal of 20343665111507 is 70511156634302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20343665111507 is a prime.

It is a super-2 number, since 2×20343665111507² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20343665113507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171832555753 + 10171832555754.

It is an arithmetic number, because the mean of its divisors is an integer number (10171832555754).

Almost surely, 2^{20343665111507} is an apocalyptic number.

20343665111507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343665111507 is an equidigital number, since it uses as much as digits as its factorization.

20343665111507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 20343665111507 in words is "twenty trillion, three hundred forty-three billion, six hundred sixty-five million, one hundred eleven thousand, five hundred seven".