31430201020 has 24 divisors (see below), whose sum is σ = 66103606800. Its totient is φ = 12552997632.

The previous prime is 31430200999. The next prime is 31430201039. The reversal of 31430201020 is 2010203413.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31430200985 and 31430201003.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1179165 + ... + 1205524.

It is an arithmetic number, because the mean of its divisors is an integer number (2754316950).

Almost surely, 2^31430201020 is an apocalyptic number.

It is an amenable number.

31430201020 is an abundant number, since it is smaller than the sum of its proper divisors (34673405780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31430201020 is a wasteful number, since it uses less digits than its factorization.

31430201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385357 (or 2385355 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31430201020 its reverse (2010203413), we get a palindrome (33440404433).

The spelling of 31430201020 in words is "thirty-one billion, four hundred thirty million, two hundred one thousand, twenty".