20511322067 has 2 divisors, whose sum is σ = 20511322068. Its totient is φ = 20511322066.

The previous prime is 20511321983. The next prime is 20511322141. The reversal of 20511322067 is 76022311502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20511322067 - 2²⁰ = 20510273491 is a prime.

It is not a weakly prime, because it can be changed into another prime (20511372067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10255661033 + 10255661034.

It is an arithmetic number, because the mean of its divisors is an integer number (10255661034).

Almost surely, 2^20511322067 is an apocalyptic number.

20511322067 is a deficient number, since it is larger than the sum of its proper divisors (1).

20511322067 is an equidigital number, since it uses as much as digits as its factorization.

20511322067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 20511322067 its reverse (76022311502), we get a palindrome (96533633569).

The spelling of 20511322067 in words is "twenty billion, five hundred eleven million, three hundred twenty-two thousand, sixty-seven".