23188967440 has 80 divisors (see below), whose sum is σ = 54533509632. Its totient is φ = 9169293312.

The previous prime is 23188967429. The next prime is 23188967441. The reversal of 23188967440 is 4476988132.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (23188967441) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12158967 + ... + 12160873.

Almost surely, 2^23188967440 is an apocalyptic number.

23188967440 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 23188967440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27266754816).

23188967440 is an abundant number, since it is smaller than the sum of its proper divisors (31344542192).

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

23188967440 is a wasteful number, since it uses less digits than its factorization.

23188967440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584 (or 3578 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 23188967440 in words is "twenty-three billion, one hundred eighty-eight million, nine hundred sixty-seven thousand, four hundred forty".