182000201821 has 4 divisors (see below), whose sum is σ = 182004870652. Its totient is φ = 181995532992.

The previous prime is 182000201809. The next prime is 182000201827. The reversal of 182000201821 is 128102000281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 128102000281 = 109 ⋅1175247709.

It can be written as a sum of positive squares in 2 ways, for example, as 80777597796 + 101222604025 = 284214^2 + 318155^2 .

It is a cyclic number.

It is not a de Polignac number, because 182000201821 - 2⁷ = 182000201693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182000201827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2275446 + ... + 2354071.

It is an arithmetic number, because the mean of its divisors is an integer number (45501217663).

Almost surely, 2^182000201821 is an apocalyptic number.

It is an amenable number.

182000201821 is a deficient number, since it is larger than the sum of its proper divisors (4668831).

182000201821 is an equidigital number, since it uses as much as digits as its factorization.

182000201821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668830.

The product of its (nonzero) digits is 512, while the sum is 25.

The spelling of 182000201821 in words is "one hundred eighty-two billion, two hundred one thousand, eight hundred twenty-one".