20385820384 has 12 divisors (see below), whose sum is σ = 40134583944. Its totient is φ = 10192910176.

The previous prime is 20385820381. The next prime is 20385820393. The reversal of 20385820384 is 48302858302.

It is a self number, because there is not a number n which added to its sum of digits gives 20385820384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20385820381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318528412 + ... + 318528475.

It is an arithmetic number, because the mean of its divisors is an integer number (3344548662).

Almost surely, 2^20385820384 is an apocalyptic number.

It is an amenable number.

20385820384 is a deficient number, since it is larger than the sum of its proper divisors (19748763560).

20385820384 is an equidigital number, since it uses as much as digits as its factorization.

20385820384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637056897 (or 637056889 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 43.

The spelling of 20385820384 in words is "twenty billion, three hundred eighty-five million, eight hundred twenty thousand, three hundred eighty-four".