18157436269019 has 4 divisors (see below), whose sum is σ = 18157445791344. Its totient is φ = 18157426746696.

The previous prime is 18157436268991. The next prime is 18157436269039. The reversal of 18157436269019 is 91096263475181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18157436269019 - 2³⁶ = 18088716792283 is a prime.

It is a super-2 number, since 2×18157436269019² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18157436269039) 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 in 3 ways as a sum of consecutive naturals, for example, 805367 + ... + 6079760.

It is an arithmetic number, because the mean of its divisors is an integer number (4539361447836).

It is a 1-persistent number, because it is pandigital, but 2⋅18157436269019 = 36314872538038 is not.

Almost surely, 2^{18157436269019} is an apocalyptic number.

18157436269019 is a deficient number, since it is larger than the sum of its proper divisors (9522325).

18157436269019 is an equidigital number, since it uses as much as digits as its factorization.

18157436269019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9522324.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 18157436269019 in words is "eighteen trillion, one hundred fifty-seven billion, four hundred thirty-six million, two hundred sixty-nine thousand, nineteen".