21140240143 has 8 divisors (see below), whose sum is σ = 23065598160. Its totient is φ = 19215468480.

The previous prime is 21140240101. The next prime is 21140240203. The reversal of 21140240143 is 34104204112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21140240143 - 2¹³ = 21140231951 is a prime.

It is a super-3 number, since 3×21140240143³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140240743) 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 7 ways as a sum of consecutive naturals, for example, 69430 + ... + 217027.

It is an arithmetic number, because the mean of its divisors is an integer number (2883199770).

Almost surely, 2^21140240143 is an apocalyptic number.

21140240143 is a deficient number, since it is larger than the sum of its proper divisors (1925358017).

21140240143 is a wasteful number, since it uses less digits than its factorization.

21140240143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293177.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21140240143 its reverse (34104204112), we get a palindrome (55244444255).

The spelling of 21140240143 in words is "twenty-one billion, one hundred forty million, two hundred forty thousand, one hundred forty-three".