23531809828 has 12 divisors (see below), whose sum is σ = 41181744240. Its totient is φ = 11765597192.

The previous prime is 23531809817. The next prime is 23531809837. The reversal of 23531809828 is 82890813532.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242475 + ... + 325357.

It is an arithmetic number, because the mean of its divisors is an integer number (3431812020).

Almost surely, 2^23531809828 is an apocalyptic number.

It is an amenable number.

23531809828 is a deficient number, since it is larger than the sum of its proper divisors (17649934412).

23531809828 is a wasteful number, since it uses less digits than its factorization.

23531809828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153866 (or 153864 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

It can be divided in two parts, 2353 and 1809828, that added together give a palindrome (1812181).

The spelling of 23531809828 in words is "twenty-three billion, five hundred thirty-one million, eight hundred nine thousand, eight hundred twenty-eight".