31102020304 has 20 divisors (see below), whose sum is σ = 61108901280. Its totient is φ = 15331981280.

The previous prime is 31102020281. The next prime is 31102020307. The reversal of 31102020304 is 40302020113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102020307) 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, 13688134 + ... + 13690405.

It is an arithmetic number, because the mean of its divisors is an integer number (3055445064).

Almost surely, 2^31102020304 is an apocalyptic number.

It is an amenable number.

31102020304 is a deficient number, since it is larger than the sum of its proper divisors (30006880976).

31102020304 is a wasteful number, since it uses less digits than its factorization.

31102020304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27378618 (or 27378612 counting only the distinct ones).

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

Adding to 31102020304 its reverse (40302020113), we get a palindrome (71404040417).

The spelling of 31102020304 in words is "thirty-one billion, one hundred two million, twenty thousand, three hundred four".