21698184103 has 2 divisors, whose sum is σ = 21698184104. Its totient is φ = 21698184102.

The previous prime is 21698184049. The next prime is 21698184169. The reversal of 21698184103 is 30148189612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21698184103 - 2²⁹ = 21161313191 is a prime.

It is a super-2 number, since 2×21698184103² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21698184103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21698184803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10849092051 + 10849092052.

It is an arithmetic number, because the mean of its divisors is an integer number (10849092052).

Almost surely, 2^21698184103 is an apocalyptic number.

21698184103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21698184103 is an equidigital number, since it uses as much as digits as its factorization.

21698184103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 21698184103 in words is "twenty-one billion, six hundred ninety-eight million, one hundred eighty-four thousand, one hundred three".