21899956103 has 2 divisors, whose sum is σ = 21899956104. Its totient is φ = 21899956102.

The previous prime is 21899956061. The next prime is 21899956151. The reversal of 21899956103 is 30165999812.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21899956103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21899956153) 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, 10949978051 + 10949978052.

It is an arithmetic number, because the mean of its divisors is an integer number (10949978052).

Almost surely, 2^21899956103 is an apocalyptic number.

21899956103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21899956103 is an equidigital number, since it uses as much as digits as its factorization.

21899956103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The spelling of 21899956103 in words is "twenty-one billion, eight hundred ninety-nine million, nine hundred fifty-six thousand, one hundred three".