18000051000031 has 2 divisors, whose sum is σ = 18000051000032. Its totient is φ = 18000051000030.

The previous prime is 18000051000013. The next prime is 18000051000037. The reversal of 18000051000031 is 13000015000081.

Together with previous prime (18000051000013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18000051000031 - 2¹⁷ = 18000050868959 is a prime.

It is a super-2 number, since 2×18000051000031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18000050999972 and 18000051000008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18000051000037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9000025500015 + 9000025500016.

It is an arithmetic number, because the mean of its divisors is an integer number (9000025500016).

Almost surely, 2^{18000051000031} is an apocalyptic number.

18000051000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

18000051000031 is an equidigital number, since it uses as much as digits as its factorization.

18000051000031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 19.

The spelling of 18000051000031 in words is "eighteen trillion, fifty-one million, thirty-one", and thus it is an aban number and an uban number.