31134020 has 24 divisors (see below), whose sum is σ = 67150104. Its totient is φ = 12116736.

The previous prime is 31134017. The next prime is 31134043. The reversal of 31134020 is 2043113.

It can be written as a sum of positive squares in 4 ways, for example, as 1800964 + 29333056 = 1342^2 + 5416^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31133986 and 31134004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20297 + ... + 21776.

It is an arithmetic number, because the mean of its divisors is an integer number (2797921).

Almost surely, 2^31134020 is an apocalyptic number.

It is an amenable number.

31134020 is an abundant number, since it is smaller than the sum of its proper divisors (36016084).

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

31134020 is a wasteful number, since it uses less digits than its factorization.

31134020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42119 (or 42117 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31134020 is about 5579.7867342758. The cubic root of 31134020 is about 314.5901110284.

Adding to 31134020 its reverse (2043113), we get a palindrome (33177133).

The spelling of 31134020 in words is "thirty-one million, one hundred thirty-four thousand, twenty".