20201000004 has 72 divisors (see below), whose sum is σ = 53833328640. Its totient is φ = 6374472192.

The previous prime is 20200999919. The next prime is 20201000009. The reversal of 20201000004 is 40000010202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a self number, because there is not a number n which added to its sum of digits gives 20201000004.

It is not an unprimeable number, because it can be changed into a prime (20201000009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45444 + ... + 206075.

It is an arithmetic number, because the mean of its divisors is an integer number (747685120).

Almost surely, 2^20201000004 is an apocalyptic number.

It is an amenable number.

20201000004 is an abundant number, since it is smaller than the sum of its proper divisors (33632328636).

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

20201000004 is a wasteful number, since it uses less digits than its factorization.

20201000004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251649 (or 251644 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20201000004 its reverse (40000010202), we get a palindrome (60201010206).

The spelling of 20201000004 in words is "twenty billion, two hundred one million, four", and thus it is an aban number.