20039821804 has 6 divisors (see below), whose sum is σ = 35069688164. Its totient is φ = 10019910900.

The previous prime is 20039821801. The next prime is 20039821843. The reversal of 20039821804 is 40812893002.

It is not an unprimeable number, because it can be changed into a prime (20039821801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2504977722 + ... + 2504977729.

Almost surely, 2^20039821804 is an apocalyptic number.

It is an amenable number.

20039821804 is a deficient number, since it is larger than the sum of its proper divisors (15029866360).

20039821804 is a wasteful number, since it uses less digits than its factorization.

20039821804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009955455 (or 5009955453 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 20039821804 in words is "twenty billion, thirty-nine million, eight hundred twenty-one thousand, eight hundred four".