22113511420 has 144 divisors (see below), whose sum is σ = 62694148608. Its totient is φ = 6362254080.

The previous prime is 22113511369. The next prime is 22113511423. The reversal of 22113511420 is 2411531122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 22113511391 and 22113511400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22113511423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217777 + ... + 302743.

It is an arithmetic number, because the mean of its divisors is an integer number (435376032).

Almost surely, 2^22113511420 is an apocalyptic number.

22113511420 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 22113511420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31347074304).

22113511420 is an abundant number, since it is smaller than the sum of its proper divisors (40580637188).

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

22113511420 is a wasteful number, since it uses less digits than its factorization.

22113511420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85020 (or 85005 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The spelling of 22113511420 in words is "twenty-two billion, one hundred thirteen million, five hundred eleven thousand, four hundred twenty".