23005321440 has 96 divisors (see below), whose sum is σ = 72489707136. Its totient is φ = 6132810240.

The previous prime is 23005321439. The next prime is 23005321447. The reversal of 23005321440 is 4412350032.

It is a tau number, because it is divible by the number of its divisors (96).

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 23005321440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23005321447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2146495 + ... + 2157185.

It is an arithmetic number, because the mean of its divisors is an integer number (755101116).

Almost surely, 2^23005321440 is an apocalyptic number.

23005321440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23005321440 is an abundant number, since it is smaller than the sum of its proper divisors (49484385696).

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

23005321440 is a wasteful number, since it uses less digits than its factorization.

23005321440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15192 (or 15184 counting only the distinct ones).

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

Adding to 23005321440 its reverse (4412350032), we get a palindrome (27417671472).

The spelling of 23005321440 in words is "twenty-three billion, five million, three hundred twenty-one thousand, four hundred forty".