21244501626 has 32 divisors (see below), whose sum is σ = 42684956160. Its totient is φ = 7048916784.

The previous prime is 21244501613. The next prime is 21244501627. The reversal of 21244501626 is 62610544212.

It is not an unprimeable number, because it can be changed into a prime (21244501627) 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, 1180371 + ... + 1198233.

It is an arithmetic number, because the mean of its divisors is an integer number (1333904880).

Almost surely, 2^21244501626 is an apocalyptic number.

21244501626 is an abundant number, since it is smaller than the sum of its proper divisors (21440454534).

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

21244501626 is a wasteful number, since it uses less digits than its factorization.

21244501626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18770.

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 21244501626 in words is "twenty-one billion, two hundred forty-four million, five hundred one thousand, six hundred twenty-six".