21527345284 has 9 divisors (see below), whose sum is σ = 37673367781. Its totient is φ = 10763525920.

The previous prime is 21527345267. The next prime is 21527345299. The reversal of 21527345284 is 48254372512.

The square root of 21527345284 is 146722.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18003735684 + 3523609600 = 134178^2 + 59360^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21527345284.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 256764 + ... + 330124.

Almost surely, 2^21527345284 is an apocalyptic number.

21527345284 is the 146722-nd square number.

It is an amenable number.

21527345284 is a deficient number, since it is larger than the sum of its proper divisors (16146022497).

21527345284 is an frugal number, since it uses more digits than its factorization.

21527345284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146726 (or 73363 counting only the distinct ones).

The product of its digits is 537600, while the sum is 43.

The spelling of 21527345284 in words is "twenty-one billion, five hundred twenty-seven million, three hundred forty-five thousand, two hundred eighty-four".