21550060662 has 48 divisors (see below), whose sum is σ = 47011552560. Its totient is φ = 6546705984.

The previous prime is 21550060633. The next prime is 21550060709. The reversal of 21550060662 is 26606005512.

It is a happy number.

It is a super-2 number, since 2×21550060662² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 464664 + ... + 508932.

It is an arithmetic number, because the mean of its divisors is an integer number (979407345).

Almost surely, 2^21550060662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21550060662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23505776280).

21550060662 is an abundant number, since it is smaller than the sum of its proper divisors (25461491898).

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

21550060662 is a wasteful number, since it uses less digits than its factorization.

21550060662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44445 (or 44366 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 21550060662 in words is "twenty-one billion, five hundred fifty million, sixty thousand, six hundred sixty-two".