21529060 has 48 divisors (see below), whose sum is σ = 52206336. Its totient is φ = 7304832.

The previous prime is 21529051. The next prime is 21529061. The reversal of 21529060 is 6092512.

It is not an unprimeable number, because it can be changed into a prime (21529061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13674 + ... + 15166.

It is an arithmetic number, because the mean of its divisors is an integer number (1087632).

Almost surely, 2^21529060 is an apocalyptic number.

21529060 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 21529060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26103168).

21529060 is an abundant number, since it is smaller than the sum of its proper divisors (30677276).

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

21529060 is a wasteful number, since it uses less digits than its factorization.

21529060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 21529060 is about 4639.9418099799. The cubic root of 21529060 is about 278.1901120121.

The spelling of 21529060 in words is "twenty-one million, five hundred twenty-nine thousand, sixty".