20102031031 has 4 divisors (see below), whose sum is σ = 20356487200. Its totient is φ = 19847574864.

The previous prime is 20102031029. The next prime is 20102031049. The reversal of 20102031031 is 13013020102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20102031031 - 2¹ = 20102031029 is a prime.

It is a super-2 number, since 2×20102031031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102031011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 127227966 + ... + 127228123.

It is an arithmetic number, because the mean of its divisors is an integer number (5089121800).

Almost surely, 2^20102031031 is an apocalyptic number.

20102031031 is a deficient number, since it is larger than the sum of its proper divisors (254456169).

20102031031 is an equidigital number, since it uses as much as digits as its factorization.

20102031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254456168.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20102031031 its reverse (13013020102), we get a palindrome (33115051133).

The spelling of 20102031031 in words is "twenty billion, one hundred two million, thirty-one thousand, thirty-one".