14721821173 has 2 divisors, whose sum is σ = 14721821174. Its totient is φ = 14721821172.

The previous prime is 14721821161. The next prime is 14721821197. The reversal of 14721821173 is 37112812741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10440343684 + 4281477489 = 102178^2 + 65433^2 .

It is a cyclic number.

It is not a de Polignac number, because 14721821173 - 2⁵ = 14721821141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14721881173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7360910586 + 7360910587.

It is an arithmetic number, because the mean of its divisors is an integer number (7360910587).

Almost surely, 2^14721821173 is an apocalyptic number.

It is an amenable number.

14721821173 is a deficient number, since it is larger than the sum of its proper divisors (1).

14721821173 is an equidigital number, since it uses as much as digits as its factorization.

14721821173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 37.

The spelling of 14721821173 in words is "fourteen billion, seven hundred twenty-one million, eight hundred twenty-one thousand, one hundred seventy-three".