23491273806 has 320 divisors, whose sum is σ = 72970039296. Its totient is φ = 5449420800.

The previous prime is 23491273787. The next prime is 23491273807. The reversal of 23491273806 is 60837219432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23491273807) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5024686 + ... + 5029358.

Almost surely, 2^23491273806 is an apocalyptic number.

23491273806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 23491273806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36485019648).

23491273806 is an abundant number, since it is smaller than the sum of its proper divisors (49478765490).

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

23491273806 is a wasteful number, since it uses less digits than its factorization.

23491273806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749 (or 4740 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 23491273806 in words is "twenty-three billion, four hundred ninety-one million, two hundred seventy-three thousand, eight hundred six".