22155540320420 has 48 divisors (see below), whose sum is σ = 51833386125360. Its totient is φ = 7898420737536.

The previous prime is 22155540320383. The next prime is 22155540320429. The reversal of 22155540320420 is 2402304555122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 314442805504 + 21841097514916 = 560752^2 + 4673446^2 .

It is not an unprimeable number, because it can be changed into a prime (22155540320429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1469192747 + ... + 1469207826.

It is an arithmetic number, because the mean of its divisors is an integer number (1079862210945).

Almost surely, 2^{22155540320420} is an apocalyptic number.

22155540320420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22155540320420 is an abundant number, since it is smaller than the sum of its proper divisors (29677845804940).

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

22155540320420 is a wasteful number, since it uses less digits than its factorization.

22155540320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938400624 (or 2938400622 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 22155540320420 its reverse (2402304555122), we get a palindrome (24557844875542).

The spelling of 22155540320420 in words is "twenty-two trillion, one hundred fifty-five billion, five hundred forty million, three hundred twenty thousand, four hundred twenty".