23510780081 has 4 divisors (see below), whose sum is σ = 23512049652. Its totient is φ = 23509510512.

The previous prime is 23510779997. The next prime is 23510780089. The reversal of 23510780081 is 18008701532.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11065146481 + 12445633600 = 105191^2 + 111560^2 .

It is a cyclic number.

It is not a de Polignac number, because 23510780081 - 2¹⁴ = 23510763697 is a prime.

It is a super-2 number, since 2×23510780081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23510780089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606590 + ... + 644183.

It is an arithmetic number, because the mean of its divisors is an integer number (5878012413).

Almost surely, 2^23510780081 is an apocalyptic number.

It is an amenable number.

23510780081 is a deficient number, since it is larger than the sum of its proper divisors (1269571).

23510780081 is a wasteful number, since it uses less digits than its factorization.

23510780081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269570.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 23510780081 in words is "twenty-three billion, five hundred ten million, seven hundred eighty thousand, eighty-one".