20328768188 has 6 divisors (see below), whose sum is σ = 35575344336. Its totient is φ = 10164384092.

The previous prime is 20328768167. The next prime is 20328768199. The reversal of 20328768188 is 88186782302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2541096020 + ... + 2541096027.

It is an arithmetic number, because the mean of its divisors is an integer number (5929224056).

Almost surely, 2^20328768188 is an apocalyptic number.

It is an amenable number.

20328768188 is a deficient number, since it is larger than the sum of its proper divisors (15246576148).

20328768188 is a wasteful number, since it uses less digits than its factorization.

20328768188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082192051 (or 5082192049 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 20328768188 in words is "twenty billion, three hundred twenty-eight million, seven hundred sixty-eight thousand, one hundred eighty-eight".