16938270731 has 2 divisors, whose sum is σ = 16938270732. Its totient is φ = 16938270730.

The previous prime is 16938270707. The next prime is 16938270749. The reversal of 16938270731 is 13707283961.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16938270731 is a prime.

It is a super-2 number, since 2×16938270731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16938270131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8469135365 + 8469135366.

It is an arithmetic number, because the mean of its divisors is an integer number (8469135366).

Almost surely, 2^16938270731 is an apocalyptic number.

16938270731 is a deficient number, since it is larger than the sum of its proper divisors (1).

16938270731 is an equidigital number, since it uses as much as digits as its factorization.

16938270731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 16938270731 in words is "sixteen billion, nine hundred thirty-eight million, two hundred seventy thousand, seven hundred thirty-one".