21524003130 has 96 divisors (see below), whose sum is σ = 63254295360. Its totient is φ = 4660830720.

The previous prime is 21524003107. The next prime is 21524003131. The reversal of 21524003130 is 3130042512.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21524003097 and 21524003106.

It is not an unprimeable number, because it can be changed into a prime (21524003131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 357391 + ... + 413250.

It is an arithmetic number, because the mean of its divisors is an integer number (658898910).

Almost surely, 2^21524003130 is an apocalyptic number.

21524003130 is an abundant number, since it is smaller than the sum of its proper divisors (41730292230).

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

21524003130 is a wasteful number, since it uses less digits than its factorization.

21524003130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770684 (or 770677 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21524003130 its reverse (3130042512), we get a palindrome (24654045642).

The spelling of 21524003130 in words is "twenty-one billion, five hundred twenty-four million, three thousand, one hundred thirty".