180938421 has 16 divisors (see below), whose sum is σ = 268300800. Its totient is φ = 120515904.

The previous prime is 180938419. The next prime is 180938431. The reversal of 180938421 is 124839081.

It is not a de Polignac number, because 180938421 - 2¹ = 180938419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180938411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36525 + ... + 41181.

It is an arithmetic number, because the mean of its divisors is an integer number (16768800).

Almost surely, 2^180938421 is an apocalyptic number.

It is an amenable number.

180938421 is a deficient number, since it is larger than the sum of its proper divisors (87362379).

180938421 is a wasteful number, since it uses less digits than its factorization.

180938421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105 (or 6099 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 180938421 is about 13451.3352868777. The cubic root of 180938421 is about 565.6011259461.

The spelling of 180938421 in words is "one hundred eighty million, nine hundred thirty-eight thousand, four hundred twenty-one".