181886012 has 48 divisors (see below), whose sum is σ = 417742080. Its totient is φ = 67132800.

The previous prime is 181885987. The next prime is 181886027. The reversal of 181886012 is 210688181.

It is a super-2 number, since 2×181886012² = 66165042722528288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9689 + ... + 21392.

It is an arithmetic number, because the mean of its divisors is an integer number (8702960).

Almost surely, 2^181886012 is an apocalyptic number.

It is an amenable number.

181886012 is an abundant number, since it is smaller than the sum of its proper divisors (235856068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181886012 is a wasteful number, since it uses less digits than its factorization.

181886012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31122 (or 31120 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 35.

The square root of 181886012 is about 13486.5122251826. The cubic root of 181886012 is about 566.5867755114.

The spelling of 181886012 in words is "one hundred eighty-one million, eight hundred eighty-six thousand, twelve".