20031311004 has 48 divisors (see below), whose sum is σ = 49636143648. Its totient is φ = 6265663488.

The previous prime is 20031310991. The next prime is 20031311009. The reversal of 20031311004 is 40011313002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031311009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76939 + ... + 214434.

It is an arithmetic number, because the mean of its divisors is an integer number (1034086326).

Almost surely, 2^20031311004 is an apocalyptic number.

It is an amenable number.

20031311004 is an abundant number, since it is smaller than the sum of its proper divisors (29604832644).

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

20031311004 is a wasteful number, since it uses less digits than its factorization.

20031311004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291734 (or 291732 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20031311004 its reverse (40011313002), we get a palindrome (60042624006).

The spelling of 20031311004 in words is "twenty billion, thirty-one million, three hundred eleven thousand, four".