21276040003 has 4 divisors (see below), whose sum is σ = 21348654768. Its totient is φ = 21203425240.

The previous prime is 21276039949. The next prime is 21276040021. The reversal of 21276040003 is 30004067212.

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

It is a cyclic number.

It is not a de Polignac number, because 21276040003 - 2¹⁷ = 21275908931 is a prime.

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 21276040003.

It is not an unprimeable number, because it can be changed into a prime (21276040703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36306943 + ... + 36307528.

It is an arithmetic number, because the mean of its divisors is an integer number (5337163692).

Almost surely, 2^21276040003 is an apocalyptic number.

21276040003 is a deficient number, since it is larger than the sum of its proper divisors (72614765).

21276040003 is an equidigital number, since it uses as much as digits as its factorization.

21276040003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72614764.

The product of its (nonzero) digits is 2016, while the sum is 25.

The spelling of 21276040003 in words is "twenty-one billion, two hundred seventy-six million, forty thousand, three".