18905738548 has 12 divisors (see below), whose sum is σ = 33086942532. Its totient is φ = 9452326400.

The previous prime is 18905738503. The next prime is 18905738561. The reversal of 18905738548 is 84583750981.

It can be written as a sum of positive squares in 2 ways, for example, as 1862958244 + 17042780304 = 43162^2 + 130548^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18905738492 and 18905738501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51565 + ... + 201172.

It is an arithmetic number, because the mean of its divisors is an integer number (2757245211).

Almost surely, 2^18905738548 is an apocalyptic number.

It is an amenable number.

18905738548 is a deficient number, since it is larger than the sum of its proper divisors (14181203984).

18905738548 is a wasteful number, since it uses less digits than its factorization.

18905738548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271442 (or 271440 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 58.

The spelling of 18905738548 in words is "eighteen billion, nine hundred five million, seven hundred thirty-eight thousand, five hundred forty-eight".