21426646752003 has 4 divisors (see below), whose sum is σ = 28568862336008. Its totient is φ = 14284431168000.

The previous prime is 21426646752001. The next prime is 21426646752023. The reversal of 21426646752003 is 30025764662412.

It is a happy number.

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

It is not a de Polignac number, because 21426646752003 - 2¹ = 21426646752001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21426646752001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3571107791998 + ... + 3571107792003.

It is an arithmetic number, because the mean of its divisors is an integer number (7142215584002).

Almost surely, 2^{21426646752003} is an apocalyptic number.

21426646752003 is a deficient number, since it is larger than the sum of its proper divisors (7142215584005).

21426646752003 is an equidigital number, since it uses as much as digits as its factorization.

21426646752003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7142215584004.

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 21426646752003 in words is "twenty-one trillion, four hundred twenty-six billion, six hundred forty-six million, seven hundred fifty-two thousand, three".