18080170731 has 32 divisors (see below), whose sum is σ = 31439290880. Its totient is φ = 10052291808.

The previous prime is 18080170729. The next prime is 18080170739. The reversal of 18080170731 is 13707108081.

It is not a de Polignac number, because 18080170731 - 2¹ = 18080170729 is a prime.

It is a super-2 number, since 2×18080170731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18080170739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1285741 + ... + 1299726.

It is an arithmetic number, because the mean of its divisors is an integer number (982477840).

Almost surely, 2^18080170731 is an apocalyptic number.

18080170731 is a deficient number, since it is larger than the sum of its proper divisors (13359120149).

18080170731 is a wasteful number, since it uses less digits than its factorization.

18080170731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585520 (or 2585514 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 36.

The spelling of 18080170731 in words is "eighteen billion, eighty million, one hundred seventy thousand, seven hundred thirty-one".