11323020511 has 4 divisors (see below), whose sum is σ = 12352386024. Its totient is φ = 10293655000.

The previous prime is 11323020509. The next prime is 11323020517. The reversal of 11323020511 is 11502032311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11323020511 - 2¹ = 11323020509 is a prime.

It is a super-3 number, since 3×11323020511³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11323020517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514682740 + ... + 514682761.

It is an arithmetic number, because the mean of its divisors is an integer number (3088096506).

Almost surely, 2^11323020511 is an apocalyptic number.

11323020511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11323020511 is a deficient number, since it is larger than the sum of its proper divisors (1029365513).

11323020511 is a wasteful number, since it uses less digits than its factorization.

11323020511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029365512.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 11323020511 its reverse (11502032311), we get a palindrome (22825052822).

The spelling of 11323020511 in words is "eleven billion, three hundred twenty-three million, twenty thousand, five hundred eleven".