21143144000 has 112 divisors (see below), whose sum is σ = 57121324416. Its totient is φ = 7688384000.

The previous prime is 21143143991. The next prime is 21143144041. The reversal of 21143144000 is 44134112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32132 + ... + 208131.

Almost surely, 2^21143144000 is an apocalyptic number.

21143144000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21143144000 is an abundant number, since it is smaller than the sum of its proper divisors (35978180416).

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

21143144000 is a wasteful number, since it uses less digits than its factorization.

21143144000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240301 (or 240281 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21143144000 its reverse (44134112), we get a palindrome (21187278112).

The spelling of 21143144000 in words is "twenty-one billion, one hundred forty-three million, one hundred forty-four thousand".