20110001013 has 12 divisors (see below), whose sum is σ = 29139416748. Its totient is φ = 13364373120.

The previous prime is 20110001011. The next prime is 20110001039. The reversal of 20110001013 is 31010001102.

It can be written as a sum of positive squares in 2 ways, for example, as 7133829444 + 12976171569 = 84462^2 + 113913^2 .

It is not a de Polignac number, because 20110001013 - 2¹ = 20110001011 is a prime.

It is a super-2 number, since 2×20110001013² (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 a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20110000986 and 20110001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110001011) 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, 3521508 + ... + 3527213.

It is an arithmetic number, because the mean of its divisors is an integer number (2428284729).

Almost surely, 2^20110001013 is an apocalyptic number.

It is an amenable number.

20110001013 is a deficient number, since it is larger than the sum of its proper divisors (9029415735).

20110001013 is a wasteful number, since it uses less digits than its factorization.

20110001013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7049044 (or 7049041 counting only the distinct ones).

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

Adding to 20110001013 its reverse (31010001102), we get a palindrome (51120002115).

The spelling of 20110001013 in words is "twenty billion, one hundred ten million, one thousand, thirteen".