21524042512 has 40 divisors (see below), whose sum is σ = 49197819392. Its totient is φ = 8927020800.

The previous prime is 21524042483. The next prime is 21524042513.

It is a happy number.

21524042512 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (21524042513) 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, 3096189 + ... + 3103132.

Almost surely, 2^21524042512 is an apocalyptic number.

It is an amenable number.

21524042512 is an abundant number, since it is smaller than the sum of its proper divisors (27673776880).

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

21524042512 is a wasteful number, since it uses less digits than its factorization.

21524042512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199367 (or 6199361 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

It can be divided in two parts, 215240 and 42512, that added together give a palindrome (257752).

The spelling of 21524042512 in words is "twenty-one billion, five hundred twenty-four million, forty-two thousand, five hundred twelve".