18454665485 has 16 divisors (see below), whose sum is σ = 22276667952. Its totient is φ = 14676480000.

The previous prime is 18454665473. The next prime is 18454665497. The reversal of 18454665485 is 58456645481.

It is an interprime number because it is at equal distance from previous prime (18454665473) and next prime (18454665497).

It can be written as a sum of positive squares in 8 ways, for example, as 1235452201 + 17219213284 = 35149^2 + 131222^2 .

It is not a de Polignac number, because 18454665485 - 2²² = 18450471181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18454665485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1274285 + ... + 1288685.

It is an arithmetic number, because the mean of its divisors is an integer number (1392291747).

Almost surely, 2^18454665485 is an apocalyptic number.

It is an amenable number.

18454665485 is a deficient number, since it is larger than the sum of its proper divisors (3822002467).

18454665485 is a wasteful number, since it uses less digits than its factorization.

18454665485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15904.

The product of its digits is 18432000, while the sum is 56.

The spelling of 18454665485 in words is "eighteen billion, four hundred fifty-four million, six hundred sixty-five thousand, four hundred eighty-five".