18701338576457 has 4 divisors (see below), whose sum is σ = 18704756848896. Its totient is φ = 18697920304020.

The previous prime is 18701338576423. The next prime is 18701338576463. The reversal of 18701338576457 is 75467583310781.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18701338576457 - 2¹² = 18701338572361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18701338576393 and 18701338576402.

It is not an unprimeable number, because it can be changed into a prime (18701338576477) 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, 1709128013 + ... + 1709138954.

It is an arithmetic number, because the mean of its divisors is an integer number (4676189212224).

Almost surely, 2^{18701338576457} is an apocalyptic number.

It is an amenable number.

18701338576457 is a deficient number, since it is larger than the sum of its proper divisors (3418272439).

18701338576457 is an equidigital number, since it uses as much as digits as its factorization.

18701338576457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418272438.

The product of its (nonzero) digits is 118540800, while the sum is 65.

The spelling of 18701338576457 in words is "eighteen trillion, seven hundred one billion, three hundred thirty-eight million, five hundred seventy-six thousand, four hundred fifty-seven".