21142343003 has 4 divisors (see below), whose sum is σ = 21360305400. Its totient is φ = 20924380608.

The previous prime is 21142342987. The next prime is 21142343039. The reversal of 21142343003 is 30034324112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21142343003 - 2⁴ = 21142342987 is a prime.

It is a super-3 number, since 3×21142343003³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21142343003.

It is not an unprimeable number, because it can be changed into a prime (21142343093) 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 3 ways as a sum of consecutive naturals, for example, 108981053 + ... + 108981246.

It is an arithmetic number, because the mean of its divisors is an integer number (5340076350).

Almost surely, 2^21142343003 is an apocalyptic number.

21142343003 is a deficient number, since it is larger than the sum of its proper divisors (217962397).

21142343003 is an equidigital number, since it uses as much as digits as its factorization.

21142343003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217962396.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21142343003 its reverse (30034324112), we get a palindrome (51176667115).

The spelling of 21142343003 in words is "twenty-one billion, one hundred forty-two million, three hundred forty-three thousand, three".