21162554016203 has 2 divisors, whose sum is σ = 21162554016204. Its totient is φ = 21162554016202.

The previous prime is 21162554016199. The next prime is 21162554016223. The reversal of 21162554016203 is 30261045526112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21162554016203 - 2² = 21162554016199 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21162554016223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10581277008101 + 10581277008102.

It is an arithmetic number, because the mean of its divisors is an integer number (10581277008102).

Almost surely, 2^{21162554016203} is an apocalyptic number.

21162554016203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21162554016203 is an equidigital number, since it uses as much as digits as its factorization.

21162554016203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 21162554016203 in words is "twenty-one trillion, one hundred sixty-two billion, five hundred fifty-four million, sixteen thousand, two hundred three".