21527849532 has 72 divisors (see below), whose sum is σ = 58683892176. Its totient is φ = 6124376832.

The previous prime is 21527849503. The next prime is 21527849537. The reversal of 21527849532 is 23594872512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21527849537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58438 + ... + 215570.

It is an arithmetic number, because the mean of its divisors is an integer number (815054058).

Almost surely, 2^21527849532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21527849532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29341946088).

21527849532 is an abundant number, since it is smaller than the sum of its proper divisors (37156042644).

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

21527849532 is a wasteful number, since it uses less digits than its factorization.

21527849532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157387 (or 157378 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 48.

The spelling of 21527849532 in words is "twenty-one billion, five hundred twenty-seven million, eight hundred forty-nine thousand, five hundred thirty-two".