21650522130 has 64 divisors (see below), whose sum is σ = 57868992000. Its totient is φ = 5760046080.

The previous prime is 21650522119. The next prime is 21650522137. The reversal of 21650522130 is 3122505612.

It is a happy number.

21650522130 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 0 + 522 + 130 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21650522094 and 21650522103.

It is not an unprimeable number, because it can be changed into a prime (21650522137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23346 + ... + 209394.

It is an arithmetic number, because the mean of its divisors is an integer number (904203000).

Almost surely, 2^21650522130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21650522130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28934496000).

21650522130 is an abundant number, since it is smaller than the sum of its proper divisors (36218469870).

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

21650522130 is a wasteful number, since it uses less digits than its factorization.

21650522130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186496 (or 186490 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 21650522130 in words is "twenty-one billion, six hundred fifty million, five hundred twenty-two thousand, one hundred thirty".