18141989538151 has 4 divisors (see below), whose sum is σ = 18584477087904. Its totient is φ = 17699501988400.

The previous prime is 18141989538149. The next prime is 18141989538161. The reversal of 18141989538151 is 15183598914181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18141989538151 - 2¹ = 18141989538149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18141989538121) 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 3 ways as a sum of consecutive naturals, for example, 221243774815 + ... + 221243774896.

It is an arithmetic number, because the mean of its divisors is an integer number (4646119271976).

Almost surely, 2^{18141989538151} is an apocalyptic number.

18141989538151 is a deficient number, since it is larger than the sum of its proper divisors (442487549753).

18141989538151 is an equidigital number, since it uses as much as digits as its factorization.

18141989538151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442487549752.

The product of its digits is 12441600, while the sum is 64.

The spelling of 18141989538151 in words is "eighteen trillion, one hundred forty-one billion, nine hundred eighty-nine million, five hundred thirty-eight thousand, one hundred fifty-one".