22109145840 has 120 divisors (see below), whose sum is σ = 74338992000. Its totient is φ = 5888696832.

The previous prime is 22109145829. The next prime is 22109145857. The reversal of 22109145840 is 4854190122.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22109145795 and 22109145804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 596161 + ... + 632159.

It is an arithmetic number, because the mean of its divisors is an integer number (619491600).

Almost surely, 2^22109145840 is an apocalyptic number.

22109145840 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 22109145840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37169496000).

22109145840 is an abundant number, since it is smaller than the sum of its proper divisors (52229846160).

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

22109145840 is a wasteful number, since it uses less digits than its factorization.

22109145840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36871 (or 36862 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 22109145840 in words is "twenty-two billion, one hundred nine million, one hundred forty-five thousand, eight hundred forty".