21525184882 has 16 divisors (see below), whose sum is σ = 34384680792. Its totient is φ = 10070944000.

The previous prime is 21525184867. The next prime is 21525184883. The reversal of 21525184882 is 28848152512.

It can be written as a sum of positive squares in 4 ways, for example, as 20531737521 + 993447361 = 143289^2 + 31519^2 .

It is not an unprimeable number, because it can be changed into a prime (21525184883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1823869 + ... + 1835632.

Almost surely, 2^21525184882 is an apocalyptic number.

21525184882 is a deficient number, since it is larger than the sum of its proper divisors (12859495910).

21525184882 is a wasteful number, since it uses less digits than its factorization.

21525184882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659693.

The product of its digits is 409600, while the sum is 46.

The spelling of 21525184882 in words is "twenty-one billion, five hundred twenty-five million, one hundred eighty-four thousand, eight hundred eighty-two".