21342143003 has 8 divisors (see below), whose sum is σ = 22743894528. Its totient is φ = 19979877544.

The previous prime is 21342142961. The next prime is 21342143027. The reversal of 21342143003 is 30034124312.

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

It is not a de Polignac number, because 21342143003 - 2²⁶ = 21275034139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

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 21342143003.

It is not an unprimeable number, because it can be changed into a prime (21342143033) 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, 9870401 + ... + 9872562.

It is an arithmetic number, because the mean of its divisors is an integer number (2842986816).

Almost surely, 2^21342143003 is an apocalyptic number.

21342143003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21342143003 is a deficient number, since it is larger than the sum of its proper divisors (1401751525).

21342143003 is a wasteful number, since it uses less digits than its factorization.

21342143003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19743033.

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

Adding to 21342143003 its reverse (30034124312), we get a palindrome (51376267315).

The spelling of 21342143003 in words is "twenty-one billion, three hundred forty-two million, one hundred forty-three thousand, three".