23540520155242 has 16 divisors (see below), whose sum is σ = 36879788797920. Its totient is φ = 11258040786768.

The previous prime is 23540520155237. The next prime is 23540520155249. The reversal of 23540520155242 is 24255102504532.

It is a junction number, because it is equal to n+sod(n) for n = 23540520155195 and 23540520155204.

It is not an unprimeable number, because it can be changed into a prime (23540520155249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2695886628 + ... + 2695895359.

It is an arithmetic number, because the mean of its divisors is an integer number (2304986799870).

Almost surely, 2^{23540520155242} is an apocalyptic number.

23540520155242 is a deficient number, since it is larger than the sum of its proper divisors (13339268642678).

23540520155242 is a wasteful number, since it uses less digits than its factorization.

23540520155242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391782085.

The product of its (nonzero) digits is 480000, while the sum is 40.

Adding to 23540520155242 its reverse (24255102504532), we get a palindrome (47795622659774).

The spelling of 23540520155242 in words is "twenty-three trillion, five hundred forty billion, five hundred twenty million, one hundred fifty-five thousand, two hundred forty-two".