23528789109 has 24 divisors (see below), whose sum is σ = 38869084800. Its totient is φ = 13435361568.

The previous prime is 23528789069. The next prime is 23528789131. The reversal of 23528789109 is 90198782532.

23528789109 is a `hidden beast` number, since 2 + 3 + 528 + 7 + 8 + 9 + 109 = 666.

It is not a de Polignac number, because 23528789109 - 2¹² = 23528785013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23128789109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45342 + ... + 221615.

It is an arithmetic number, because the mean of its divisors is an integer number (1619545200).

Almost surely, 2^23528789109 is an apocalyptic number.

It is an amenable number.

23528789109 is a deficient number, since it is larger than the sum of its proper divisors (15340295691).

23528789109 is a wasteful number, since it uses less digits than its factorization.

23528789109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268369 (or 268366 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 23528789109 in words is "twenty-three billion, five hundred twenty-eight million, seven hundred eighty-nine thousand, one hundred nine".