18257444827642 has 4 divisors (see below), whose sum is σ = 27386167241466. Its totient is φ = 9128722413820.

The previous prime is 18257444827607. The next prime is 18257444827673. The reversal of 18257444827642 is 24672844475281.

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

It can be written as a sum of positive squares in only one way, i.e., 13802183486641 + 4455261341001 = 3715129^2 + 2110749^2 .

It is a super-4 number, since 4×18257444827642⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4564361206909 + ... + 4564361206912.

Almost surely, 2^{18257444827642} is an apocalyptic number.

18257444827642 is a deficient number, since it is larger than the sum of its proper divisors (9128722413824).

18257444827642 is an equidigital number, since it uses as much as digits as its factorization.

18257444827642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9128722413823.

The product of its digits is 192675840, while the sum is 64.

The spelling of 18257444827642 in words is "eighteen trillion, two hundred fifty-seven billion, four hundred forty-four million, eight hundred twenty-seven thousand, six hundred forty-two".