21423350100 has 72 divisors (see below), whose sum is σ = 62006253568. Its totient is φ = 5710924800.

The previous prime is 21423350051. The next prime is 21423350171. The reversal of 21423350100 is 105332412.

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 23 ways as a sum of consecutive naturals, for example, 997677 + ... + 1018923.

Almost surely, 2^21423350100 is an apocalyptic number.

21423350100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21423350100 is an abundant number, since it is smaller than the sum of its proper divisors (40582903468).

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

21423350100 is a wasteful number, since it uses less digits than its factorization.

21423350100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24625 (or 24618 counting only the distinct ones).

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

Adding to 21423350100 its reverse (105332412), we get a palindrome (21528682512).

The spelling of 21423350100 in words is "twenty-one billion, four hundred twenty-three million, three hundred fifty thousand, one hundred".