23040185681 has 4 divisors (see below), whose sum is σ = 23041351332. Its totient is φ = 23039020032.

The previous prime is 23040185671. The next prime is 23040185683. The reversal of 23040185681 is 18658104032.

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 2276816656 + 20763369025 = 47716^2 + 144095^2 .

It is a cyclic number.

It is not a de Polignac number, because 23040185681 - 2¹⁸ = 23039923537 is a prime.

It is a super-2 number, since 2×23040185681² (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 (23040185683) 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, 552656 + ... + 592881.

It is an arithmetic number, because the mean of its divisors is an integer number (5760337833).

Almost surely, 2^23040185681 is an apocalyptic number.

It is an amenable number.

23040185681 is a deficient number, since it is larger than the sum of its proper divisors (1165651).

23040185681 is a wasteful number, since it uses less digits than its factorization.

23040185681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165650.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 23040185681 in words is "twenty-three billion, forty million, one hundred eighty-five thousand, six hundred eighty-one".