210020000031 has 6 divisors (see below), whose sum is σ = 303362222280. Its totient is φ = 140013333348.

The previous prime is 210019999993. The next prime is 210020000051. The reversal of 210020000031 is 130000020012.

It is a happy number.

210020000031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210020000031 - 2⁶ = 210019999967 is a prime.

It is a super-2 number, since 2×210020000031² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 23335555559 = 210020000031 / (2 + 1 + 0 + 0 + 2 + 0 + 0 + 0 + 0 + 0 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 210019999968 and 210020000022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020000051) 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 5 ways as a sum of consecutive naturals, for example, 11667777771 + ... + 11667777788.

It is an arithmetic number, because the mean of its divisors is an integer number (50560370380).

Almost surely, 2^210020000031 is an apocalyptic number.

210020000031 is a deficient number, since it is larger than the sum of its proper divisors (93342222249).

210020000031 is a wasteful number, since it uses less digits than its factorization.

210020000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23335555565 (or 23335555562 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 210020000031 its reverse (130000020012), we get a palindrome (340020020043).

The spelling of 210020000031 in words is "two hundred ten billion, twenty million, thirty-one", and thus it is an aban number.