18626636887058 has 6 divisors (see below), whose sum is σ = 27939964485909. Its totient is φ = 9313315391756.

The previous prime is 18626636887057. The next prime is 18626636887121. The reversal of 18626636887058 is 85078863662681.

It can be written as a sum of positive squares in 2 ways, for example, as 15603708723409 + 3022928163649 = 3950153^2 + 1738657^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3051773.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18626636887057) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4577660 + ... + 7629432.

Almost surely, 2^{18626636887058} is an apocalyptic number.

18626636887058 is a deficient number, since it is larger than the sum of its proper divisors (9313327598851).

18626636887058 is an frugal number, since it uses more digits than its factorization.

18626636887058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6103548 (or 3051775 counting only the distinct ones).

The product of its (nonzero) digits is 1114767360, while the sum is 74.

The spelling of 18626636887058 in words is "eighteen trillion, six hundred twenty-six billion, six hundred thirty-six million, eight hundred eighty-seven thousand, fifty-eight".