23403400544 has 48 divisors (see below), whose sum is σ = 47472586560. Its totient is φ = 11352130560.

The previous prime is 23403400487. The next prime is 23403400589. The reversal of 23403400544 is 44500430432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60377 + ... + 224615.

It is an arithmetic number, because the mean of its divisors is an integer number (989012220).

Almost surely, 2^23403400544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23403400544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23736293280).

23403400544 is an abundant number, since it is smaller than the sum of its proper divisors (24069186016).

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

23403400544 is a wasteful number, since it uses less digits than its factorization.

23403400544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164383 (or 164375 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 23403400544 its reverse (44500430432), we get a palindrome (67903830976).

The spelling of 23403400544 in words is "twenty-three billion, four hundred three million, four hundred thousand, five hundred forty-four".