21035321300 has 36 divisors (see below), whose sum is σ = 52167598560. Its totient is φ = 7212109920.

The previous prime is 21035321233. The next prime is 21035321371. The reversal of 21035321300 is 312353012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 15024530 + ... + 15025929.

It is an arithmetic number, because the mean of its divisors is an integer number (1449099960).

Almost surely, 2^21035321300 is an apocalyptic number.

21035321300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21035321300 is an abundant number, since it is smaller than the sum of its proper divisors (31132277260).

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

21035321300 is a wasteful number, since it uses less digits than its factorization.

21035321300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30050480 (or 30050473 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 21035321300 its reverse (312353012), we get a palindrome (21347674312).

The spelling of 21035321300 in words is "twenty-one billion, thirty-five million, three hundred twenty-one thousand, three hundred".