20080171800 has 144 divisors (see below), whose sum is σ = 72623372640. Its totient is φ = 4942805760.

The previous prime is 20080171763. The next prime is 20080171847. The reversal of 20080171800 is 817108002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 405664 + ... + 452463.

Almost surely, 2^20080171800 is an apocalyptic number.

20080171800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20080171800 is an abundant number, since it is smaller than the sum of its proper divisors (52543200840).

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

20080171800 is a wasteful number, since it uses less digits than its factorization.

20080171800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858162 (or 858150 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

Adding to 20080171800 its reverse (817108002), we get a palindrome (20897279802).

The spelling of 20080171800 in words is "twenty billion, eighty million, one hundred seventy-one thousand, eight hundred".