18590985748 has 24 divisors (see below), whose sum is σ = 33199088328. Its totient is φ = 9106071936.

The previous prime is 18590985739. The next prime is 18590985773. The reversal of 18590985748 is 84758909581.

It can be written as a sum of positive squares in 4 ways, for example, as 5972507524 + 12618478224 = 77282^2 + 112332^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18590985748.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71290 + ... + 205582.

It is an arithmetic number, because the mean of its divisors is an integer number (1383295347).

Almost surely, 2^18590985748 is an apocalyptic number.

It is an amenable number.

18590985748 is a deficient number, since it is larger than the sum of its proper divisors (14608102580).

18590985748 is a wasteful number, since it uses less digits than its factorization.

18590985748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135003 (or 135001 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 64.

The spelling of 18590985748 in words is "eighteen billion, five hundred ninety million, nine hundred eighty-five thousand, seven hundred forty-eight".