20001031004 has 12 divisors (see below), whose sum is σ = 35012754504. Its totient is φ = 9997386864.

The previous prime is 20001030949. The next prime is 20001031007. The reversal of 20001031004 is 40013010002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001031007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767747 + ... + 793370.

It is an arithmetic number, because the mean of its divisors is an integer number (2917729542).

Almost surely, 2^20001031004 is an apocalyptic number.

It is an amenable number.

20001031004 is a deficient number, since it is larger than the sum of its proper divisors (15011723500).

20001031004 is a wasteful number, since it uses less digits than its factorization.

20001031004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564324 (or 1564322 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20001031004 its reverse (40013010002), we get a palindrome (60014041006).

The spelling of 20001031004 in words is "twenty billion, one million, thirty-one thousand, four".