11923529531 has 4 divisors (see below), whose sum is σ = 11929413912. Its totient is φ = 11917645152.

The previous prime is 11923529507. The next prime is 11923529551. The reversal of 11923529531 is 13592532911.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11923529531 is a prime.

It is a super-2 number, since 2×11923529531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11923529551) 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, 2939150 + ... + 2943203.

It is an arithmetic number, because the mean of its divisors is an integer number (2982353478).

Almost surely, 2^11923529531 is an apocalyptic number.

11923529531 is a deficient number, since it is larger than the sum of its proper divisors (5884381).

11923529531 is an equidigital number, since it uses as much as digits as its factorization.

11923529531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5884380.

The product of its digits is 72900, while the sum is 41.

The spelling of 11923529531 in words is "eleven billion, nine hundred twenty-three million, five hundred twenty-nine thousand, five hundred thirty-one".