21304535000 has 80 divisors (see below), whose sum is σ = 57047551440. Its totient is φ = 7304400000.

The previous prime is 21304534987. The next prime is 21304535003. The reversal of 21304535000 is 53540312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304535003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 269351 + ... + 339350.

It is an arithmetic number, because the mean of its divisors is an integer number (713094393).

Almost surely, 2^21304535000 is an apocalyptic number.

21304535000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21304535000 is an abundant number, since it is smaller than the sum of its proper divisors (35743016440).

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

21304535000 is an equidigital number, since it uses as much as digits as its factorization.

21304535000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608734 (or 608715 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The spelling of 21304535000 in words is "twenty-one billion, three hundred four million, five hundred thirty-five thousand".