20324573808 has 80 divisors (see below), whose sum is σ = 65460976896. Its totient is φ = 5279109120.

The previous prime is 20324573767. The next prime is 20324573821. The reversal of 20324573808 is 80837542302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 20324573808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2745841 + ... + 2753232.

Almost surely, 2^20324573808 is an apocalyptic number.

20324573808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20324573808 is an abundant number, since it is smaller than the sum of its proper divisors (45136403088).

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

20324573808 is a wasteful number, since it uses less digits than its factorization.

20324573808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499102 (or 5499096 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 20324573808 in words is "twenty billion, three hundred twenty-four million, five hundred seventy-three thousand, eight hundred eight".