21226542326020 has 48 divisors (see below), whose sum is σ = 46204509576960. Its totient is φ = 8181539037056.

The previous prime is 21226542325993. The next prime is 21226542326071. The reversal of 21226542326020 is 2062324562212.

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 15 ways as a sum of consecutive naturals, for example, 36087472 + ... + 36670951.

It is an arithmetic number, because the mean of its divisors is an integer number (962593949520).

Almost surely, 2^{21226542326020} is an apocalyptic number.

21226542326020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21226542326020 is an abundant number, since it is smaller than the sum of its proper divisors (24977967250940).

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

21226542326020 is a wasteful number, since it uses less digits than its factorization.

21226542326020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72758964 (or 72758962 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 21226542326020 its reverse (2062324562212), we get a palindrome (23288866888232).

The spelling of 21226542326020 in words is "twenty-one trillion, two hundred twenty-six billion, five hundred forty-two million, three hundred twenty-six thousand, twenty".