21482817121936 has 45 divisors (see below), whose sum is σ = 42425055216649. Its totient is φ = 10538258439488.

The previous prime is 21482817121877. The next prime is 21482817121981. The reversal of 21482817121936 is 63912171828412.

The square root of 21482817121936 is 4634956.

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., 15486900915600 + 5995916206336 = 3935340^2 + 2448656^2 .

It is a super-2 number, since 2×21482817121936² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 982599741 + ... + 982621603.

Almost surely, 2^{21482817121936} is an apocalyptic number.

21482817121936 is the 4634956-th square number.

It is an amenable number.

21482817121936 is a deficient number, since it is larger than the sum of its proper divisors (20942238094713).

21482817121936 is an frugal number, since it uses more digits than its factorization.

21482817121936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43840 (or 21918 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The spelling of 21482817121936 in words is "twenty-one trillion, four hundred eighty-two billion, eight hundred seventeen million, one hundred twenty-one thousand, nine hundred thirty-six".