20082171804 has 24 divisors (see below), whose sum is σ = 47145880320. Its totient is φ = 6652988784.

The previous prime is 20082171779. The next prime is 20082171839. The reversal of 20082171804 is 40817128002.

It is a happy number.

It is a super-2 number, since 2×20082171804² (a number of 21 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 7 ways as a sum of consecutive naturals, for example, 5131524 + ... + 5135435.

It is an arithmetic number, because the mean of its divisors is an integer number (1964411680).

Almost surely, 2^20082171804 is an apocalyptic number.

It is an amenable number.

20082171804 is an abundant number, since it is smaller than the sum of its proper divisors (27063708516).

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

20082171804 is a wasteful number, since it uses less digits than its factorization.

20082171804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267129 (or 10267127 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

Adding to 20082171804 its reverse (40817128002), we get a palindrome (60899299806).

The spelling of 20082171804 in words is "twenty billion, eighty-two million, one hundred seventy-one thousand, eight hundred four".