20011011003 has 12 divisors (see below), whose sum is σ = 28917732480. Its totient is φ = 13334702256.

The previous prime is 20011011001. The next prime is 20011011073. The reversal of 20011011003 is 30011011002.

It is not a de Polignac number, because 20011011003 - 2¹ = 20011011001 is a prime.

It is a super-2 number, since 2×20011011003² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20011011001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 476376 + ... + 516677.

It is an arithmetic number, because the mean of its divisors is an integer number (2409811040).

Almost surely, 2^20011011003 is an apocalyptic number.

20011011003 is a deficient number, since it is larger than the sum of its proper divisors (8906721477).

20011011003 is a wasteful number, since it uses less digits than its factorization.

20011011003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995298 (or 995295 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 20011011003 its reverse (30011011002), we get a palindrome (50022022005).

Subtracting 20011011003 from its reverse (30011011002), we obtain a palindrome (9999999999).

The spelling of 20011011003 in words is "twenty billion, eleven million, eleven thousand, three".