21454204003 has 2 divisors, whose sum is σ = 21454204004. Its totient is φ = 21454204002.

The previous prime is 21454203893. The next prime is 21454204049. The reversal of 21454204003 is 30040245412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21454204003 - 2²⁹ = 20917333091 is a prime.

It is not a weakly prime, because it can be changed into another prime (21454204903) 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 as a sum of consecutive naturals, namely, 10727102001 + 10727102002.

It is an arithmetic number, because the mean of its divisors is an integer number (10727102002).

Almost surely, 2^21454204003 is an apocalyptic number.

21454204003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21454204003 is an equidigital number, since it uses as much as digits as its factorization.

21454204003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 21454204003 its reverse (30040245412), we get a palindrome (51494449415).

The spelling of 21454204003 in words is "twenty-one billion, four hundred fifty-four million, two hundred four thousand, three".