20000031000 has 256 divisors, whose sum is σ = 64256924160. Its totient is φ = 5176281600.

The previous prime is 20000030977. The next prime is 20000031011. The reversal of 20000031000 is 13000002.

It is a super-2 number, since 2×20000031000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a self number, because there is not a number n which added to its sum of digits gives 20000031000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25412607 + ... + 25413393.

It is an arithmetic number, because the mean of its divisors is an integer number (251003610).

Almost surely, 2^20000031000 is an apocalyptic number.

20000031000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20000031000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32128462080).

20000031000 is an abundant number, since it is smaller than the sum of its proper divisors (44256893160).

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

20000031000 is a wasteful number, since it uses less digits than its factorization.

20000031000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 1037 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 6.

Adding to 20000031000 its reverse (13000002), we get a palindrome (20013031002).

The spelling of 20000031000 in words is "twenty billion, thirty-one thousand".