23540123432240 has 40 divisors (see below), whose sum is σ = 54741246731808. Its totient is φ = 9414249845760.

The previous prime is 23540123432227. The next prime is 23540123432249. The reversal of 23540123432240 is 4223432104532.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×23540123432240³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 23540123432240.

It is not an unprimeable number, because it can be changed into a prime (23540123432249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27696356 + ... + 28533635.

Almost surely, 2^{23540123432240} is an apocalyptic number.

23540123432240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23540123432240 is an abundant number, since it is smaller than the sum of its proper divisors (31201123299568).

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

23540123432240 is a wasteful number, since it uses less digits than its factorization.

23540123432240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56235237 (or 56235231 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 23540123432240 its reverse (4223432104532), we get a palindrome (27763555536772).

The spelling of 23540123432240 in words is "twenty-three trillion, five hundred forty billion, one hundred twenty-three million, four hundred thirty-two thousand, two hundred forty".