18061377380 has 12 divisors (see below), whose sum is σ = 37928892540. Its totient is φ = 7224550944.

The previous prime is 18061377361. The next prime is 18061377491. The reversal of 18061377380 is 8377316081.

It can be written as a sum of positive squares in 2 ways, for example, as 13196035876 + 4865341504 = 114874^2 + 69752^2 .

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 3 ways as a sum of consecutive naturals, for example, 451534415 + ... + 451534454.

It is an arithmetic number, because the mean of its divisors is an integer number (3160741045).

Almost surely, 2^18061377380 is an apocalyptic number.

18061377380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18061377380 is an abundant number, since it is smaller than the sum of its proper divisors (19867515160).

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

18061377380 is a wasteful number, since it uses less digits than its factorization.

18061377380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903068878 (or 903068876 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 18061377380 in words is "eighteen billion, sixty-one million, three hundred seventy-seven thousand, three hundred eighty".