23291018019840 has 704 divisors, whose sum is σ = 80928247841280. Its totient is φ = 5694019338240.

The previous prime is 23291018019817. The next prime is 23291018019853. The reversal of 23291018019840 is 4891081019232.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 23291018019840.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 8982265584 + ... + 8982268176.

Almost surely, 2^{23291018019840} is an apocalyptic number.

23291018019840 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 23291018019840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40464123920640).

23291018019840 is an abundant number, since it is smaller than the sum of its proper divisors (57637229821440).

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

23291018019840 is a wasteful number, since it uses less digits than its factorization.

23291018019840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518 (or 3500 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The spelling of 23291018019840 in words is "twenty-three trillion, two hundred ninety-one billion, eighteen million, nineteen thousand, eight hundred forty".