31373020164 has 12 divisors (see below), whose sum is σ = 73203713744. Its totient is φ = 10457673384.

The previous prime is 31373020163. The next prime is 31373020171. The reversal of 31373020164 is 46102037313.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31373020163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307209162 + ... + 1307209185.

Almost surely, 2^31373020164 is an apocalyptic number.

It is an amenable number.

31373020164 is an abundant number, since it is smaller than the sum of its proper divisors (41830693580).

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

31373020164 is a wasteful number, since it uses less digits than its factorization.

31373020164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614418354 (or 2614418352 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

Adding to 31373020164 its reverse (46102037313), we get a palindrome (77475057477).

The spelling of 31373020164 in words is "thirty-one billion, three hundred seventy-three million, twenty thousand, one hundred sixty-four".