21627530660 has 48 divisors (see below), whose sum is σ = 47596139136. Its totient is φ = 8239325952.

The previous prime is 21627530641. The next prime is 21627530723. The reversal of 21627530660 is 6603572612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6287 + ... + 208073.

It is an arithmetic number, because the mean of its divisors is an integer number (991586232).

Almost surely, 2^21627530660 is an apocalyptic number.

21627530660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21627530660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23798069568).

21627530660 is an abundant number, since it is smaller than the sum of its proper divisors (25968608476).

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

21627530660 is a wasteful number, since it uses less digits than its factorization.

21627530660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202052 (or 202050 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 21627530660 in words is "twenty-one billion, six hundred twenty-seven million, five hundred thirty thousand, six hundred sixty".