22155258840 has 512 divisors, whose sum is σ = 83346278400. Its totient is φ = 4628643840.

The previous prime is 22155258821. The next prime is 22155258887. The reversal of 22155258840 is 4885255122.

It is a junction number, because it is equal to n+sod(n) for n = 22155258792 and 22155258801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 50467341 + ... + 50467779.

It is an arithmetic number, because the mean of its divisors is an integer number (162785700).

Almost surely, 2^22155258840 is an apocalyptic number.

22155258840 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 22155258840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41673139200).

22155258840 is an abundant number, since it is smaller than the sum of its proper divisors (61191019560).

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

22155258840 is a wasteful number, since it uses less digits than its factorization.

22155258840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 42.

The spelling of 22155258840 in words is "twenty-two billion, one hundred fifty-five million, two hundred fifty-eight thousand, eight hundred forty".