180010381 has 4 divisors (see below), whose sum is σ = 181792764. Its totient is φ = 178228000.

The previous prime is 180010379. The next prime is 180010393. The reversal of 180010381 is 183010081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158004900 + 22005481 = 12570^2 + 4691^2 .

It is a cyclic number.

It is not a de Polignac number, because 180010381 - 2¹ = 180010379 is a prime.

It is a super-2 number, since 2×180010381² = 64807474535530322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180010301) 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 3 ways as a sum of consecutive naturals, for example, 891040 + ... + 891241.

It is an arithmetic number, because the mean of its divisors is an integer number (45448191).

Almost surely, 2^180010381 is an apocalyptic number.

It is an amenable number.

180010381 is a deficient number, since it is larger than the sum of its proper divisors (1782383).

180010381 is a wasteful number, since it uses less digits than its factorization.

180010381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782382.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 180010381 is about 13416.7947364488. The cubic root of 180010381 is about 564.6324714478.

The spelling of 180010381 in words is "one hundred eighty million, ten thousand, three hundred eighty-one".