21033033300 has 54 divisors (see below), whose sum is σ = 65926877198. Its totient is φ = 5608808640.

The previous prime is 21033033293. The next prime is 21033033317. The reversal of 21033033300 is 333033012.

21033033300 is a `hidden beast` number, since 2 + 1 + 0 + 330 + 3 + 330 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1527559056 + 19505474244 = 39084^2 + 139662^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11684119 + ... + 11685918.

Almost surely, 2^21033033300 is an apocalyptic number.

21033033300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033033300 is an abundant number, since it is smaller than the sum of its proper divisors (44893843898).

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

21033033300 is a wasteful number, since it uses less digits than its factorization.

21033033300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23370057 (or 23370047 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 18.

Adding to 21033033300 its reverse (333033012), we get a palindrome (21366066312).

The spelling of 21033033300 in words is "twenty-one billion, thirty-three million, thirty-three thousand, three hundred".