20100011031 has 16 divisors (see below), whose sum is σ = 30470302720. Its totient is φ = 13088378520.

The previous prime is 20100011021. The next prime is 20100011051. The reversal of 20100011031 is 13011000102.

It is not a de Polignac number, because 20100011031 - 2¹⁴ = 20099994647 is a prime.

It is a super-2 number, since 2×20100011031² (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 Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100011021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8655175 + ... + 8657496.

It is an arithmetic number, because the mean of its divisors is an integer number (1904393920).

Almost surely, 2^20100011031 is an apocalyptic number.

20100011031 is a deficient number, since it is larger than the sum of its proper divisors (10370291689).

20100011031 is a wasteful number, since it uses less digits than its factorization.

20100011031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17312723 (or 17312717 counting only the distinct ones).

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

Adding to 20100011031 its reverse (13011000102), we get a palindrome (33111011133).

The spelling of 20100011031 in words is "twenty billion, one hundred million, eleven thousand, thirty-one".