181866030 has 32 divisors (see below), whose sum is σ = 445768704. Its totient is φ = 47465376.

The previous prime is 181866011. The next prime is 181866059. The reversal of 181866030 is 30668181.

It is a junction number, because it is equal to n+sod(n) for n = 181865982 and 181866000.

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, 63082 + ... + 65901.

It is an arithmetic number, because the mean of its divisors is an integer number (13930272).

Almost surely, 2^181866030 is an apocalyptic number.

181866030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181866030 is an abundant number, since it is smaller than the sum of its proper divisors (263902674).

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

181866030 is a wasteful number, since it uses less digits than its factorization.

181866030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129040.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 181866030 is about 13485.7713906176. The cubic root of 181866030 is about 566.5660263410.

The spelling of 181866030 in words is "one hundred eighty-one million, eight hundred sixty-six thousand, thirty".