23910221440 has 256 divisors, whose sum is σ = 66910302720. Its totient is φ = 8001552384.

The previous prime is 23910221429. The next prime is 23910221441. The reversal of 23910221440 is 4412201932.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 23910221399 and 23910221408.

It is not an unprimeable number, because it can be changed into a prime (23910221441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36955197 + ... + 36955843.

It is an arithmetic number, because the mean of its divisors is an integer number (261368370).

Almost surely, 2^23910221440 is an apocalyptic number.

23910221440 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 23910221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33455151360).

23910221440 is an abundant number, since it is smaller than the sum of its proper divisors (43000081280).

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

23910221440 is a wasteful number, since it uses less digits than its factorization.

23910221440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

It can be divided in two parts, 23910 and 221440, that added together give a triangular number (245350 = T₇₀₀).

The spelling of 23910221440 in words is "twenty-three billion, nine hundred ten million, two hundred twenty-one thousand, four hundred forty".