17928723913 has 2 divisors, whose sum is σ = 17928723914. Its totient is φ = 17928723912.

The previous prime is 17928723887. The next prime is 17928723919. The reversal of 17928723913 is 31932782971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10763440009 + 7165283904 = 103747^2 + 84648^2 .

It is a cyclic number.

It is not a de Polignac number, because 17928723913 - 2¹⁷ = 17928592841 is a prime.

It is a super-2 number, since 2×17928723913² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17928723919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8964361956 + 8964361957.

It is an arithmetic number, because the mean of its divisors is an integer number (8964361957).

Almost surely, 2^17928723913 is an apocalyptic number.

It is an amenable number.

17928723913 is a deficient number, since it is larger than the sum of its proper divisors (1).

17928723913 is an equidigital number, since it uses as much as digits as its factorization.

17928723913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 52.

The spelling of 17928723913 in words is "seventeen billion, nine hundred twenty-eight million, seven hundred twenty-three thousand, nine hundred thirteen".