20011003000 has 64 divisors (see below), whose sum is σ = 47308716000. Its totient is φ = 7921843200.

The previous prime is 20011002967. The next prime is 20011003013. The reversal of 20011003000 is 30011002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6150 + ... + 200149.

Almost surely, 2^20011003000 is an apocalyptic number.

20011003000 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 20011003000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23654358000).

20011003000 is an abundant number, since it is smaller than the sum of its proper divisors (27297713000).

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

20011003000 is a wasteful number, since it uses less digits than its factorization.

20011003000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206417 (or 206403 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 7.

Adding to 20011003000 its reverse (30011002), we get a palindrome (20041014002).

It can be divided in two parts, 2001 and 1003000, that added together give a palindrome (1005001).

The spelling of 20011003000 in words is "twenty billion, eleven million, three thousand".