23115605540 has 48 divisors (see below), whose sum is σ = 48694867200. Its totient is φ = 9217327872.

The previous prime is 23115605509. The next prime is 23115605549. The reversal of 23115605540 is 4550651132.

It is a junction number, because it is equal to n+sod(n) for n = 23115605497 and 23115605506.

It is not an unprimeable number, because it can be changed into a prime (23115605549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11632427 + ... + 11634413.

It is an arithmetic number, because the mean of its divisors is an integer number (1014476400).

Almost surely, 2^23115605540 is an apocalyptic number.

23115605540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23115605540 is an abundant number, since it is smaller than the sum of its proper divisors (25579261660).

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

23115605540 is a wasteful number, since it uses less digits than its factorization.

23115605540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524 (or 3522 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 23115605540 in words is "twenty-three billion, one hundred fifteen million, six hundred five thousand, five hundred forty".