23909000000 has 98 divisors (see below), whose sum is σ = 59307248670. Its totient is φ = 9563200000.

The previous prime is 23908999987. The next prime is 23909000047. The reversal of 23909000000 is 90932.

It can be written as a sum of positive squares in 7 ways, for example, as 21795207424 + 2113792576 = 147632^2 + 45976^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23909000000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 988046 + ... + 1011954.

Almost surely, 2^23909000000 is an apocalyptic number.

23909000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23909000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29653624335).

23909000000 is an abundant number, since it is smaller than the sum of its proper divisors (35398248670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23909000000 is an frugal number, since it uses more digits than its factorization.

23909000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23951 (or 23916 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 23909000000 its reverse (90932), we get a palindrome (23909090932).

The spelling of 23909000000 in words is "twenty-three billion, nine hundred nine million", and thus it is an aban number.