181872788804020 has 12 divisors (see below), whose sum is σ = 381932856488484. Its totient is φ = 72749115521600.

The previous prime is 181872788803973. The next prime is 181872788804081. The reversal of 181872788804020 is 20408887278181.

181872788804020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40678935024016 + 141193853780004 = 6378004^2 + 11882502^2 .

It is a super-2 number, since 2×181872788804020² (a number of 29 digits) 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 3 ways as a sum of consecutive naturals, for example, 4546819720081 + ... + 4546819720120.

It is an arithmetic number, because the mean of its divisors is an integer number (31827738040707).

Almost surely, 2^{181872788804020} is an apocalyptic number.

181872788804020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181872788804020 is an abundant number, since it is smaller than the sum of its proper divisors (200060067684464).

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

181872788804020 is a wasteful number, since it uses less digits than its factorization.

181872788804020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9093639440210 (or 9093639440208 counting only the distinct ones).

The product of its (nonzero) digits is 25690112, while the sum is 64.

The spelling of 181872788804020 in words is "one hundred eighty-one trillion, eight hundred seventy-two billion, seven hundred eighty-eight million, eight hundred four thousand, twenty".