21626330066020 has 24 divisors (see below), whose sum is σ = 45416630428344. Its totient is φ = 8650277304576.

The previous prime is 21626330065999. The next prime is 21626330066021. The reversal of 21626330066020 is 2066003362612.

It can be written as a sum of positive squares in 4 ways, for example, as 7847479396 + 21618482586624 = 88586^2 + 4649568^2 .

It is not an unprimeable number, because it can be changed into a prime (21626330066021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15223177 + ... + 16583056.

It is an arithmetic number, because the mean of its divisors is an integer number (1892359601181).

Almost surely, 2^{21626330066020} is an apocalyptic number.

21626330066020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21626330066020 is an abundant number, since it is smaller than the sum of its proper divisors (23790300362324).

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

21626330066020 is a wasteful number, since it uses less digits than its factorization.

21626330066020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31840239 (or 31840237 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 21626330066020 in words is "twenty-one trillion, six hundred twenty-six billion, three hundred thirty million, sixty-six thousand, twenty".