181404812 has 6 divisors (see below), whose sum is σ = 317458428. Its totient is φ = 90702404.

The previous prime is 181404809. The next prime is 181404823. The reversal of 181404812 is 218404181.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22675598 + ... + 22675605.

It is an arithmetic number, because the mean of its divisors is an integer number (52909738).

Almost surely, 2^181404812 is an apocalyptic number.

It is an amenable number.

181404812 is a deficient number, since it is larger than the sum of its proper divisors (136053616).

181404812 is a wasteful number, since it uses less digits than its factorization.

181404812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45351207 (or 45351205 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 181404812 is about 13468.6603639709. The cubic root of 181404812 is about 566.0866777816.

Adding to 181404812 its reverse (218404181), we get a palindrome (399808993).

The spelling of 181404812 in words is "one hundred eighty-one million, four hundred four thousand, eight hundred twelve".