18285445472038 has 32 divisors (see below), whose sum is σ = 28212815643264. Its totient is φ = 8881939204992.

The previous prime is 18285445472029. The next prime is 18285445472053. The reversal of 18285445472038 is 83027454458281.

It is a super-2 number, since 2×18285445472038² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 276863956 + ... + 276929992.

It is an arithmetic number, because the mean of its divisors is an integer number (881650488852).

Almost surely, 2^{18285445472038} is an apocalyptic number.

18285445472038 is a deficient number, since it is larger than the sum of its proper divisors (9927370171226).

18285445472038 is a wasteful number, since it uses less digits than its factorization.

18285445472038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71776.

The product of its (nonzero) digits is 68812800, while the sum is 61.

The spelling of 18285445472038 in words is "eighteen trillion, two hundred eighty-five billion, four hundred forty-five million, four hundred seventy-two thousand, thirty-eight".