23515020113 has 8 divisors (see below), whose sum is σ = 25739014056. Its totient is φ = 21350332800.

The previous prime is 23515020107. The next prime is 23515020131. The reversal of 23515020113 is 31102051532.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4290643009 + 19224377104 = 65503^2 + 138652^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23515020113 - 2⁴ = 23515020097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23515020413) 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, 14825828 + ... + 14827413.

It is an arithmetic number, because the mean of its divisors is an integer number (3217376757).

Almost surely, 2^23515020113 is an apocalyptic number.

It is an amenable number.

23515020113 is a deficient number, since it is larger than the sum of its proper divisors (2223993943).

23515020113 is a wasteful number, since it uses less digits than its factorization.

23515020113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29653315.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 23515020113 its reverse (31102051532), we get a palindrome (54617071645).

The spelling of 23515020113 in words is "twenty-three billion, five hundred fifteen million, twenty thousand, one hundred thirteen".