22151343420 has 144 divisors (see below), whose sum is σ = 71101255680. Its totient is φ = 5566665600.

The previous prime is 22151343419. The next prime is 22151343449. The reversal of 22151343420 is 2434315122.

22151343420 is a `hidden beast` number, since 2 + 215 + 13 + 434 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 636265 + ... + 670175.

It is an arithmetic number, because the mean of its divisors is an integer number (493758720).

Almost surely, 2^22151343420 is an apocalyptic number.

22151343420 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 22151343420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35550627840).

22151343420 is an abundant number, since it is smaller than the sum of its proper divisors (48949912260).

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

22151343420 is a wasteful number, since it uses less digits than its factorization.

22151343420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34136 (or 34131 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 22151343420 its reverse (2434315122), we get a palindrome (24585658542).

The spelling of 22151343420 in words is "twenty-two billion, one hundred fifty-one million, three hundred forty-three thousand, four hundred twenty".