20328971800 has 24 divisors (see below), whose sum is σ = 47264859900. Its totient is φ = 8131588640.

The previous prime is 20328971779. The next prime is 20328971833. The reversal of 20328971800 is 817982302.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50822230 + ... + 50822629.

Almost surely, 2^20328971800 is an apocalyptic number.

20328971800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20328971800 is an abundant number, since it is smaller than the sum of its proper divisors (26935888100).

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

20328971800 is a wasteful number, since it uses less digits than its factorization.

20328971800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101644875 (or 101644866 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 20328971800 in words is "twenty billion, three hundred twenty-eight million, nine hundred seventy-one thousand, eight hundred".