23005543540 has 96 divisors (see below), whose sum is σ = 56096409600. Its totient is φ = 7761882240.

The previous prime is 23005543513. The next prime is 23005543541. The reversal of 23005543540 is 4534550032.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23005543541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6150991 + ... + 6154729.

It is an arithmetic number, because the mean of its divisors is an integer number (584337600).

Almost surely, 2^23005543540 is an apocalyptic number.

23005543540 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 23005543540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28048204800).

23005543540 is an abundant number, since it is smaller than the sum of its proper divisors (33090866060).

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

23005543540 is a wasteful number, since it uses less digits than its factorization.

23005543540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445 (or 4443 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 31.

The spelling of 23005543540 in words is "twenty-three billion, five million, five hundred forty-three thousand, five hundred forty".