18501851835451 has 2 divisors, whose sum is σ = 18501851835452. Its totient is φ = 18501851835450.

The previous prime is 18501851835427. The next prime is 18501851835461. The reversal of 18501851835451 is 15453815810581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18501851835451 - 2⁷ = 18501851835323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18501851835392 and 18501851835401.

It is not a weakly prime, because it can be changed into another prime (18501851835461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9250925917725 + 9250925917726.

It is an arithmetic number, because the mean of its divisors is an integer number (9250925917726).

Almost surely, 2^{18501851835451} is an apocalyptic number.

18501851835451 is a deficient number, since it is larger than the sum of its proper divisors (1).

18501851835451 is an equidigital number, since it uses as much as digits as its factorization.

18501851835451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840000, while the sum is 55.

The spelling of 18501851835451 in words is "eighteen trillion, five hundred one billion, eight hundred fifty-one million, eight hundred thirty-five thousand, four hundred fifty-one".