31004044420 has 48 divisors (see below), whose sum is σ = 68007663360. Its totient is φ = 11857700736.

The previous prime is 31004044411. The next prime is 31004044429. The reversal of 31004044420 is 2444040013.

It is an interprime number because it is at equal distance from previous prime (31004044411) and next prime (31004044429).

It is a super-2 number, since 2×31004044420² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31004044391 and 31004044400.

It is not an unprimeable number, because it can be changed into a prime (31004044429) 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 15 ways as a sum of consecutive naturals, for example, 199752 + ... + 319231.

It is an arithmetic number, because the mean of its divisors is an integer number (1416826320).

Almost surely, 2^31004044420 is an apocalyptic number.

It is an amenable number.

31004044420 is an abundant number, since it is smaller than the sum of its proper divisors (37003618940).

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

31004044420 is a wasteful number, since it uses less digits than its factorization.

31004044420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519124 (or 519122 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 31004044420 its reverse (2444040013), we get a palindrome (33448084433).

The spelling of 31004044420 in words is "thirty-one billion, four million, forty-four thousand, four hundred twenty".