21144144300 has 72 divisors (see below), whose sum is σ = 64396920000. Its totient is φ = 5341677120.

The previous prime is 21144144299. The next prime is 21144144311. The reversal of 21144144300 is 344144112.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1849050 + ... + 1860449.

Almost surely, 2^21144144300 is an apocalyptic number.

21144144300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21144144300 is an abundant number, since it is smaller than the sum of its proper divisors (43252775700).

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

21144144300 is a wasteful number, since it uses less digits than its factorization.

21144144300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709535 (or 3709528 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21144144300 its reverse (344144112), we get a palindrome (21488288412).

It can be divided in two parts, 2114 and 4144300, that added together give a palindrome (4146414).

The spelling of 21144144300 in words is "twenty-one billion, one hundred forty-four million, one hundred forty-four thousand, three hundred".