21144140043 has 8 divisors (see below), whose sum is σ = 30360816528. Its totient is φ = 13011778464.

The previous prime is 21144139999. The next prime is 21144140071. The reversal of 21144140043 is 34004144112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21144140043 - 2¹⁶ = 21144074507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21144139995 and 21144140022.

It is not an unprimeable number, because it can be changed into a prime (21144190043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271078680 + ... + 271078757.

It is an arithmetic number, because the mean of its divisors is an integer number (3795102066).

Almost surely, 2^21144140043 is an apocalyptic number.

21144140043 is a deficient number, since it is larger than the sum of its proper divisors (9216676485).

21144140043 is a wasteful number, since it uses less digits than its factorization.

21144140043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542157453.

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

Adding to 21144140043 its reverse (34004144112), we get a palindrome (55148284155).

The spelling of 21144140043 in words is "twenty-one billion, one hundred forty-four million, one hundred forty thousand, forty-three".