21325539682 has 8 divisors (see below), whose sum is σ = 31989956652. Its totient is φ = 10662220800.

The previous prime is 21325539643. The next prime is 21325539701. The reversal of 21325539682 is 28693552312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21316292001 + 9247681 = 146001^2 + 3041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21325539682² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224119 + ... + 304762.

Almost surely, 2^21325539682 is an apocalyptic number.

21325539682 is a deficient number, since it is larger than the sum of its proper divisors (10664416970).

21325539682 is a wasteful number, since it uses less digits than its factorization.

21325539682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549044.

The product of its digits is 777600, while the sum is 46.

The spelling of 21325539682 in words is "twenty-one billion, three hundred twenty-five million, five hundred thirty-nine thousand, six hundred eighty-two".