18380273040 has 60 divisors (see below), whose sum is σ = 61727086044. Its totient is φ = 4901405952.

The previous prime is 18380273003. The next prime is 18380273053. The reversal of 18380273040 is 4037208381.

18380273040 is a `hidden beast` number, since 1 + 8 + 380 + 273 + 0 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5890869504 + 12489403536 = 76752^2 + 111756^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18380272986 and 18380273004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12763359 + ... + 12764798.

Almost surely, 2^18380273040 is an apocalyptic number.

18380273040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18380273040 is an abundant number, since it is smaller than the sum of its proper divisors (43346813004).

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

18380273040 is a wasteful number, since it uses less digits than its factorization.

18380273040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25528176 (or 25528167 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 18380273040 in words is "eighteen billion, three hundred eighty million, two hundred seventy-three thousand, forty".