20100000031 has 8 divisors (see below), whose sum is σ = 21335968080. Its totient is φ = 18869989248.

The previous prime is 20099999981. The next prime is 20100000047. The reversal of 20100000031 is 13000000102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20100000031 - 2⁹ = 20099999519 is a prime.

It is a super-2 number, since 2×20100000031² (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 (20100900031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1482361 + ... + 1495858.

It is an arithmetic number, because the mean of its divisors is an integer number (2666996010).

Almost surely, 2^20100000031 is an apocalyptic number.

20100000031 is a deficient number, since it is larger than the sum of its proper divisors (1235968049).

20100000031 is a wasteful number, since it uses less digits than its factorization.

20100000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978633.

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

Adding to 20100000031 its reverse (13000000102), we get a palindrome (33100000133).

The spelling of 20100000031 in words is "twenty billion, one hundred million, thirty-one", and thus it is an aban number.