31344020 has 24 divisors (see below), whose sum is σ = 66565800. Its totient is φ = 12396032.

The previous prime is 31344011. The next prime is 31344029. The reversal of 31344020 is 2044313.

It is an interprime number because it is at equal distance from previous prime (31344011) and next prime (31344029).

It can be written as a sum of positive squares in 4 ways, for example, as 2421136 + 28922884 = 1556^2 + 5378^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31344020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31344029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7025 + ... + 10584.

It is an arithmetic number, because the mean of its divisors is an integer number (2773575).

Almost surely, 2^31344020 is an apocalyptic number.

It is an amenable number.

31344020 is an abundant number, since it is smaller than the sum of its proper divisors (35221780).

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

31344020 is a wasteful number, since it uses less digits than its factorization.

31344020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17707 (or 17705 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31344020 is about 5598.5730324789. The cubic root of 31344020 is about 315.2958336106.

Adding to 31344020 its reverse (2044313), we get a palindrome (33388333).

The spelling of 31344020 in words is "thirty-one million, three hundred forty-four thousand, twenty".