18385822040 has 32 divisors (see below), whose sum is σ = 41950755360. Its totient is φ = 7250745600.

The previous prime is 18385822001. The next prime is 18385822043. The reversal of 18385822040 is 4022858381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18385822043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3234101 + ... + 3239780.

It is an arithmetic number, because the mean of its divisors is an integer number (1310961105).

Almost surely, 2^18385822040 is an apocalyptic number.

18385822040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18385822040 is an abundant number, since it is smaller than the sum of its proper divisors (23564933320).

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

18385822040 is a wasteful number, since it uses less digits than its factorization.

18385822040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473963 (or 6473959 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The spelling of 18385822040 in words is "eighteen billion, three hundred eighty-five million, eight hundred twenty-two thousand, forty".