21033525100 has 36 divisors (see below), whose sum is σ = 52163143984. Its totient is φ = 7211494080.

The previous prime is 21033525061. The next prime is 21033525119. The reversal of 21033525100 is 152533012.

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 11 ways as a sum of consecutive naturals, for example, 15023247 + ... + 15024646.

Almost surely, 2^21033525100 is an apocalyptic number.

21033525100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033525100 is an abundant number, since it is smaller than the sum of its proper divisors (31129618884).

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

21033525100 is a wasteful number, since it uses less digits than its factorization.

21033525100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30047914 (or 30047907 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The spelling of 21033525100 in words is "twenty-one billion, thirty-three million, five hundred twenty-five thousand, one hundred".