23521030440 has 32 divisors (see below), whose sum is σ = 70563091680. Its totient is φ = 6272274752.

The previous prime is 23521030433. The next prime is 23521030441. The reversal of 23521030440 is 4403012532.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23521030440.

It is not an unprimeable number, because it can be changed into a prime (23521030441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98004174 + ... + 98004413.

It is an arithmetic number, because the mean of its divisors is an integer number (2205096615).

Almost surely, 2^23521030440 is an apocalyptic number.

23521030440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23521030440 is an abundant number, since it is smaller than the sum of its proper divisors (47042061240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23521030440 is a wasteful number, since it uses less digits than its factorization.

23521030440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196008601 (or 196008597 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 23521030440 its reverse (4403012532), we get a palindrome (27924042972).

The spelling of 23521030440 in words is "twenty-three billion, five hundred twenty-one million, thirty thousand, four hundred forty".