18530657145 has 320 divisors, whose sum is σ = 45680431104. Its totient is φ = 6936814080.

The previous prime is 18530657113. The next prime is 18530657183. The reversal of 18530657145 is 54175603581.

18530657145 is a `hidden beast` number, since 1 + 8 + 5 + 30 + 6 + 571 + 45 = 666.

It is not a de Polignac number, because 18530657145 - 2⁵ = 18530657113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18530657145.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 17431884 + ... + 17432946.

Almost surely, 2^18530657145 is an apocalyptic number.

18530657145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18530657145 is an abundant number, since it is smaller than the sum of its proper divisors (27149773959).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18530657145 is a wasteful number, since it uses less digits than its factorization.

18530657145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 18530657145 in words is "eighteen billion, five hundred thirty million, six hundred fifty-seven thousand, one hundred forty-five".