180204381 has 24 divisors (see below), whose sum is σ = 298007424. Its totient is φ = 102791520.

The previous prime is 180204361. The next prime is 180204383. The reversal of 180204381 is 183402081.

180204381 is a `hidden beast` number, since 1 + 80 + 204 + 381 = 666.

It is not a de Polignac number, because 180204381 - 2⁶ = 180204317 is a prime.

It is a super-2 number, since 2×180204381² = 64947237863186322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180204383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38551 + ... + 42971.

It is an arithmetic number, because the mean of its divisors is an integer number (12416976).

Almost surely, 2^180204381 is an apocalyptic number.

It is an amenable number.

180204381 is a deficient number, since it is larger than the sum of its proper divisors (117803043).

180204381 is a wasteful number, since it uses less digits than its factorization.

180204381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5081 (or 5078 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 180204381 is about 13424.0225342481. The cubic root of 180204381 is about 564.8352363696.

The spelling of 180204381 in words is "one hundred eighty million, two hundred four thousand, three hundred eighty-one".