21143240300 has 144 divisors (see below), whose sum is σ = 57622353600. Its totient is φ = 6691345920.

The previous prime is 21143240297. The next prime is 21143240347. The reversal of 21143240300 is 304234112.

It is a super-2 number, since 2×21143240300² (a number of 21 digits) contains 22 as substring.

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

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 47 ways as a sum of consecutive naturals, for example, 422192 + ... + 469608.

Almost surely, 2^21143240300 is an apocalyptic number.

21143240300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21143240300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28811176800).

21143240300 is an abundant number, since it is smaller than the sum of its proper divisors (36479113300).

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

21143240300 is a wasteful number, since it uses less digits than its factorization.

21143240300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47465 (or 47444 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21143240300 its reverse (304234112), we get a palindrome (21447474412).

The spelling of 21143240300 in words is "twenty-one billion, one hundred forty-three million, two hundred forty thousand, three hundred".