20123343511 has 2 divisors, whose sum is σ = 20123343512. Its totient is φ = 20123343510.

The previous prime is 20123343481. The next prime is 20123343529. The reversal of 20123343511 is 11534332102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20123343511 - 2¹¹ = 20123341463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123346511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061671755 + 10061671756.

It is an arithmetic number, because the mean of its divisors is an integer number (10061671756).

Almost surely, 2^20123343511 is an apocalyptic number.

20123343511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123343511 is an equidigital number, since it uses as much as digits as its factorization.

20123343511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 20123343511 its reverse (11534332102), we get a palindrome (31657675613).

The spelling of 20123343511 in words is "twenty billion, one hundred twenty-three million, three hundred forty-three thousand, five hundred eleven".