181077020 has 12 divisors (see below), whose sum is σ = 380261784. Its totient is φ = 72430800.

The previous prime is 181077019. The next prime is 181077023. The reversal of 181077020 is 20770181.

It is a super-4 number, since 4×181077020⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181077023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4526906 + ... + 4526945.

It is an arithmetic number, because the mean of its divisors is an integer number (31688482).

Almost surely, 2^181077020 is an apocalyptic number.

181077020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181077020 is an abundant number, since it is smaller than the sum of its proper divisors (199184764).

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

181077020 is a wasteful number, since it uses less digits than its factorization.

181077020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9053860 (or 9053858 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 181077020 is about 13456.4861683873. The cubic root of 181077020 is about 565.7455060847.

The spelling of 181077020 in words is "one hundred eighty-one million, seventy-seven thousand, twenty".