22143380 has 48 divisors (see below), whose sum is σ = 53429376. Its totient is φ = 7551360.

The previous prime is 22143371. The next prime is 22143383. The reversal of 22143380 is 8334122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143383) 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 15 ways as a sum of consecutive naturals, for example, 38495 + ... + 39065.

It is an arithmetic number, because the mean of its divisors is an integer number (1113112).

Almost surely, 2^22143380 is an apocalyptic number.

22143380 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 22143380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26714688).

22143380 is an abundant number, since it is smaller than the sum of its proper divisors (31285996).

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

22143380 is a wasteful number, since it uses less digits than its factorization.

22143380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 22143380 is about 4705.6752969154. The cubic root of 22143380 is about 280.8113372478.

The spelling of 22143380 in words is "twenty-two million, one hundred forty-three thousand, three hundred eighty".