18540052380 has 72 divisors (see below), whose sum is σ = 56735903952. Its totient is φ = 4900256256.

The previous prime is 18540052357. The next prime is 18540052411. The reversal of 18540052380 is 8325004581.

It is a happy number.

18540052380 is a `hidden beast` number, since 1 + 8 + 54 + 0 + 0 + 523 + 80 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 435414 + ... + 476093.

It is an arithmetic number, because the mean of its divisors is an integer number (787998666).

Almost surely, 2^18540052380 is an apocalyptic number.

18540052380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18540052380 is an abundant number, since it is smaller than the sum of its proper divisors (38195851572).

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

18540052380 is a wasteful number, since it uses less digits than its factorization.

18540052380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911635 (or 911630 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 18540052380 in words is "eighteen billion, five hundred forty million, fifty-two thousand, three hundred eighty".