23154040809 has 8 divisors (see below), whose sum is σ = 34302282720. Its totient is φ = 15436027188.

The previous prime is 23154040799. The next prime is 23154040853. The reversal of 23154040809 is 90804045132.

23154040809 is a `hidden beast` number, since 2 + 31 + 540 + 4 + 0 + 80 + 9 = 666.

It is not a de Polignac number, because 23154040809 - 2¹⁹ = 23153516521 is a prime.

It is a super-2 number, since 2×23154040809² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23154040009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428778507 + ... + 428778560.

It is an arithmetic number, because the mean of its divisors is an integer number (4287785340).

Almost surely, 2^23154040809 is an apocalyptic number.

It is an amenable number.

23154040809 is a deficient number, since it is larger than the sum of its proper divisors (11148241911).

23154040809 is an equidigital number, since it uses as much as digits as its factorization.

23154040809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857557076 (or 857557070 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 23154040809 in words is "twenty-three billion, one hundred fifty-four million, forty thousand, eight hundred nine".