180821492 has 12 divisors (see below), whose sum is σ = 330195936. Its totient is φ = 86479800.

The previous prime is 180821449. The next prime is 180821551. The reversal of 180821492 is 294128081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982634 + ... + 982817.

It is an arithmetic number, because the mean of its divisors is an integer number (27516328).

Almost surely, 2^180821492 is an apocalyptic number.

It is an amenable number.

180821492 is a deficient number, since it is larger than the sum of its proper divisors (149374444).

180821492 is a wasteful number, since it uses less digits than its factorization.

180821492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965478 (or 1965476 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 180821492 is about 13446.9882129791. The cubic root of 180821492 is about 565.4792623398.

The spelling of 180821492 in words is "one hundred eighty million, eight hundred twenty-one thousand, four hundred ninety-two".