23515243340 has 96 divisors (see below), whose sum is σ = 51649315200. Its totient is φ = 8982005760.

The previous prime is 23515243331. The next prime is 23515243343. The reversal of 23515243340 is 4334251532.

It is a junction number, because it is equal to n+sod(n) for n = 23515243297 and 23515243306.

It is not an unprimeable number, because it can be changed into a prime (23515243343) 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, 25587401 + ... + 25588319.

It is an arithmetic number, because the mean of its divisors is an integer number (538013700).

Almost surely, 2^23515243340 is an apocalyptic number.

23515243340 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 23515243340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25824657600).

23515243340 is an abundant number, since it is smaller than the sum of its proper divisors (28134071860).

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

23515243340 is a wasteful number, since it uses less digits than its factorization.

23515243340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1393 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 23515243340 its reverse (4334251532), we get a palindrome (27849494872).

The spelling of 23515243340 in words is "twenty-three billion, five hundred fifteen million, two hundred forty-three thousand, three hundred forty".