21413152484 has 12 divisors (see below), whose sum is σ = 37477726524. Its totient is φ = 10705230624.

The previous prime is 21413152469. The next prime is 21413152493. The reversal of 21413152484 is 48425131412.

It can be written as a sum of positive squares in 2 ways, for example, as 13300547584 + 8112604900 = 115328^2 + 90070^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300167 + ... + 364590.

It is an arithmetic number, because the mean of its divisors is an integer number (3123143877).

Almost surely, 2^21413152484 is an apocalyptic number.

It is an amenable number.

21413152484 is a deficient number, since it is larger than the sum of its proper divisors (16064574040).

21413152484 is a wasteful number, since it uses less digits than its factorization.

21413152484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672814 (or 672812 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

Adding to 21413152484 its reverse (48425131412), we get a palindrome (69838283896).

The spelling of 21413152484 in words is "twenty-one billion, four hundred thirteen million, one hundred fifty-two thousand, four hundred eighty-four".