22499043840 has 1280 divisors, whose sum is σ = 101743488000. Its totient is φ = 4682022912.

The previous prime is 22499043829. The next prime is 22499043841. The reversal of 22499043840 is 4834099422.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (22499043841) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 308206044 + ... + 308206116.

It is an arithmetic number, because the mean of its divisors is an integer number (79487100).

Almost surely, 2^22499043840 is an apocalyptic number.

22499043840 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 22499043840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50871744000).

22499043840 is an abundant number, since it is smaller than the sum of its proper divisors (79244444160).

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

22499043840 is an equidigital number, since it uses as much as digits as its factorization.

22499043840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 22499043840 in words is "twenty-two billion, four hundred ninety-nine million, forty-three thousand, eight hundred forty".