21042531300 has 72 divisors (see below), whose sum is σ = 69580643776. Its totient is φ = 4809720960.

The previous prime is 21042531281. The next prime is 21042531313. The reversal of 21042531300 is 313524012.

It is a super-2 number, since 2×21042531300² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 23 ways as a sum of consecutive naturals, for example, 5008027 + ... + 5012226.

Almost surely, 2^21042531300 is an apocalyptic number.

21042531300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21042531300 is an abundant number, since it is smaller than the sum of its proper divisors (48538112476).

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

21042531300 is a wasteful number, since it uses less digits than its factorization.

21042531300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10020277 (or 10020270 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The spelling of 21042531300 in words is "twenty-one billion, forty-two million, five hundred thirty-one thousand, three hundred".