21443010100 has 36 divisors (see below), whose sum is σ = 46886561568. Its totient is φ = 8511724000.

The previous prime is 21443010059. The next prime is 21443010107. The reversal of 21443010100 is 101034412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443010107) 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, 805336 + ... + 831535.

It is an arithmetic number, because the mean of its divisors is an integer number (1302404488).

Almost surely, 2^21443010100 is an apocalyptic number.

21443010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21443010100 is an abundant number, since it is smaller than the sum of its proper divisors (25443551468).

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

21443010100 is a wasteful number, since it uses less digits than its factorization.

21443010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637016 (or 1637009 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21443010100 its reverse (101034412), we get a palindrome (21544044512).

The spelling of 21443010100 in words is "twenty-one billion, four hundred forty-three million, ten thousand, one hundred".