17923925549 has 2 divisors, whose sum is σ = 17923925550. Its totient is φ = 17923925548.

The previous prime is 17923925533. The next prime is 17923925581. The reversal of 17923925549 is 94552932971.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11525525449 + 6398400100 = 107357^2 + 79990^2 .

It is a cyclic number.

It is not a de Polignac number, because 17923925549 - 2⁴ = 17923925533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 17923925494 and 17923925503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17923925449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8961962774 + 8961962775.

It is an arithmetic number, because the mean of its divisors is an integer number (8961962775).

Almost surely, 2^17923925549 is an apocalyptic number.

It is an amenable number.

17923925549 is a deficient number, since it is larger than the sum of its proper divisors (1).

17923925549 is an equidigital number, since it uses as much as digits as its factorization.

17923925549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6123600, while the sum is 56.

The spelling of 17923925549 in words is "seventeen billion, nine hundred twenty-three million, nine hundred twenty-five thousand, five hundred forty-nine".