21403231232003 has 2 divisors, whose sum is σ = 21403231232004. Its totient is φ = 21403231232002.

The previous prime is 21403231231997. The next prime is 21403231232021. The reversal of 21403231232003 is 30023213230412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21403231232003 - 2¹² = 21403231227907 is a prime.

It is a super-2 number, since 2×21403231232003² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21403231232303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701615616001 + 10701615616002.

It is an arithmetic number, because the mean of its divisors is an integer number (10701615616002).

Almost surely, 2^{21403231232003} is an apocalyptic number.

21403231232003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21403231232003 is an equidigital number, since it uses as much as digits as its factorization.

21403231232003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21403231232003 its reverse (30023213230412), we get a palindrome (51426444462415).

The spelling of 21403231232003 in words is "twenty-one trillion, four hundred three billion, two hundred thirty-one million, two hundred thirty-two thousand, three".