18540265088 has 16 divisors (see below), whose sum is σ = 36935684610. Its totient is φ = 9270132480.

The previous prime is 18540265057. The next prime is 18540265099. The reversal of 18540265088 is 88056204581.

It can be written as a sum of positive squares in only one way, i.e., 12581660224 + 5958604864 = 112168^2 + 77192^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72422783 + ... + 72423038.

Almost surely, 2^18540265088 is an apocalyptic number.

It is an amenable number.

18540265088 is a deficient number, since it is larger than the sum of its proper divisors (18395419522).

18540265088 is an equidigital number, since it uses as much as digits as its factorization.

18540265088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144845835 (or 144845823 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 47.

The spelling of 18540265088 in words is "eighteen billion, five hundred forty million, two hundred sixty-five thousand, eighty-eight".