21037024900 has 36 divisors (see below), whose sum is σ = 45914256612. Its totient is φ = 8366162560.

The previous prime is 21037024889. The next prime is 21037024909. The reversal of 21037024900 is 942073012.

It can be written as a sum of positive squares in 6 ways, for example, as 535367044 + 20501657856 = 23138^2 + 143184^2 .

It is not an unprimeable number, because it can be changed into a prime (21037024909) 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 11 ways as a sum of consecutive naturals, for example, 590707 + ... + 625306.

It is an arithmetic number, because the mean of its divisors is an integer number (1275396017).

Almost surely, 2^21037024900 is an apocalyptic number.

21037024900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21037024900 is an abundant number, since it is smaller than the sum of its proper divisors (24877231712).

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

21037024900 is a wasteful number, since it uses less digits than its factorization.

21037024900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216200 (or 1216193 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 21037024900 its reverse (942073012), we get a palindrome (21979097912).

The spelling of 21037024900 in words is "twenty-one billion, thirty-seven million, twenty-four thousand, nine hundred".