18438061060 has 24 divisors (see below), whose sum is σ = 39103298136. Its totient is φ = 7302201600.

The previous prime is 18438061043. The next prime is 18438061063. The reversal of 18438061060 is 6016083481.

It can be written as a sum of positive squares in 4 ways, for example, as 9359401536 + 9078659524 = 96744^2 + 95282^2 .

It is not an unprimeable number, because it can be changed into a prime (18438061063) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4561857 + ... + 4565896.

It is an arithmetic number, because the mean of its divisors is an integer number (1629304089).

Almost surely, 2^18438061060 is an apocalyptic number.

18438061060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18438061060 is an abundant number, since it is smaller than the sum of its proper divisors (20665237076).

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

18438061060 is a wasteful number, since it uses less digits than its factorization.

18438061060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9127863 (or 9127861 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 18438061060 in words is "eighteen billion, four hundred thirty-eight million, sixty-one thousand, sixty".