23045421440 has 128 divisors (see below), whose sum is σ = 55960178400. Its totient is φ = 9073917952.

The previous prime is 23045421407. The next prime is 23045421449. The reversal of 23045421440 is 4412454032.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23045421449) 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, 18750746 + ... + 18751974.

Almost surely, 2^23045421440 is an apocalyptic number.

23045421440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23045421440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27980089200).

23045421440 is an abundant number, since it is smaller than the sum of its proper divisors (32914756960).

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

23045421440 is a wasteful number, since it uses less digits than its factorization.

23045421440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 23045421440 its reverse (4412454032), we get a palindrome (27457875472).

The spelling of 23045421440 in words is "twenty-three billion, forty-five million, four hundred twenty-one thousand, four hundred forty".