21032442100 has 36 divisors (see below), whose sum is σ = 46110940204. Its totient is φ = 8326241280.

The previous prime is 21032442077. The next prime is 21032442131. The reversal of 21032442100 is 124423012.

It can be written as a sum of positive squares in 6 ways, for example, as 3664365156 + 17368076944 = 60534^2 + 131788^2 .

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1074447 + ... + 1093846.

Almost surely, 2^21032442100 is an apocalyptic number.

21032442100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21032442100 is an abundant number, since it is smaller than the sum of its proper divisors (25078498104).

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

21032442100 is a wasteful number, since it uses less digits than its factorization.

21032442100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168404 (or 2168397 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21032442100 its reverse (124423012), we get a palindrome (21156865112).

The spelling of 21032442100 in words is "twenty-one billion, thirty-two million, four hundred forty-two thousand, one hundred".