18536063831047 has 32 divisors (see below), whose sum is σ = 21886844313600. Its totient is φ = 15361892490240.

The previous prime is 18536063830987. The next prime is 18536063831059. The reversal of 18536063831047 is 74013836063581.

It is a happy number.

It is not a de Polignac number, because 18536063831047 - 2⁷ = 18536063830919 is a prime.

It is a super-2 number, since 2×18536063831047² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18536063834047) 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 31 ways as a sum of consecutive naturals, for example, 1626107454 + ... + 1626118852.

It is an arithmetic number, because the mean of its divisors is an integer number (683963884800).

Almost surely, 2^{18536063831047} is an apocalyptic number.

18536063831047 is a deficient number, since it is larger than the sum of its proper divisors (3350780482553).

18536063831047 is a wasteful number, since it uses less digits than its factorization.

18536063831047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17431.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 18536063831047 in words is "eighteen trillion, five hundred thirty-six billion, sixty-three million, eight hundred thirty-one thousand, forty-seven".