21404420300 has 36 divisors (see below), whose sum is σ = 46454563176. Its totient is φ = 8560483200.

The previous prime is 21404420281. The next prime is 21404420309. The reversal of 21404420300 is 302440412.

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

It is not an unprimeable number, because it can be changed into a prime (21404420309) by changing a digit.

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, 931955 + ... + 954645.

Almost surely, 2^21404420300 is an apocalyptic number.

21404420300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21404420300 is an abundant number, since it is smaller than the sum of its proper divisors (25050142876).

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

21404420300 is a wasteful number, since it uses less digits than its factorization.

21404420300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32138 (or 32131 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21404420300 its reverse (302440412), we get a palindrome (21706860712).

The spelling of 21404420300 in words is "twenty-one billion, four hundred four million, four hundred twenty thousand, three hundred".