18501685001731 has 2 divisors, whose sum is σ = 18501685001732. Its totient is φ = 18501685001730.

The previous prime is 18501685001663. The next prime is 18501685001743. The reversal of 18501685001731 is 13710058610581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18501685001731 - 2¹¹ = 18501684999683 is a prime.

It is a super-2 number, since 2×18501685001731² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18501685001131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9250842500865 + 9250842500866.

It is an arithmetic number, because the mean of its divisors is an integer number (9250842500866).

Almost surely, 2^{18501685001731} is an apocalyptic number.

18501685001731 is a deficient number, since it is larger than the sum of its proper divisors (1).

18501685001731 is an equidigital number, since it uses as much as digits as its factorization.

18501685001731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 46.

The spelling of 18501685001731 in words is "eighteen trillion, five hundred one billion, six hundred eighty-five million, one thousand, seven hundred thirty-one".