181838202020 has 24 divisors (see below), whose sum is σ = 382021378368. Its totient is φ = 72704584800.

The previous prime is 181838202017. The next prime is 181838202067. The reversal of 181838202020 is 20202838181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1869896 + ... + 1964735.

It is an arithmetic number, because the mean of its divisors is an integer number (15917557432).

Almost surely, 2^181838202020 is an apocalyptic number.

181838202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181838202020 is an abundant number, since it is smaller than the sum of its proper divisors (200183176348).

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

181838202020 is a wasteful number, since it uses less digits than its factorization.

181838202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837011 (or 3837009 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The spelling of 181838202020 in words is "one hundred eighty-one billion, eight hundred thirty-eight million, two hundred two thousand, twenty".