21065612622 has 16 divisors (see below), whose sum is σ = 42548367312. Its totient is φ = 6952347200.

The previous prime is 21065612591. The next prime is 21065612627. The reversal of 21065612622 is 22621656012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21065612627) 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, 17380263 + ... + 17381474.

It is an arithmetic number, because the mean of its divisors is an integer number (2659272957).

Almost surely, 2^21065612622 is an apocalyptic number.

21065612622 is an abundant number, since it is smaller than the sum of its proper divisors (21482754690).

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

21065612622 is a wasteful number, since it uses less digits than its factorization.

21065612622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34761843.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 21065612622 in words is "twenty-one billion, sixty-five million, six hundred twelve thousand, six hundred twenty-two".