31004321420 has 24 divisors (see below), whose sum is σ = 65317104384. Its totient is φ = 12362103936.

The previous prime is 31004321389. The next prime is 31004321423. The reversal of 31004321420 is 2412340013.

It is a super-2 number, since 2×31004321420² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31004321392 and 31004321401.

It is not an unprimeable number, because it can be changed into a prime (31004321423) 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, 2470124 + ... + 2482643.

It is an arithmetic number, because the mean of its divisors is an integer number (2721546016).

Almost surely, 2^31004321420 is an apocalyptic number.

It is an amenable number.

31004321420 is an abundant number, since it is smaller than the sum of its proper divisors (34312782964).

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

31004321420 is a wasteful number, since it uses less digits than its factorization.

31004321420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953089 (or 4953087 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31004321420 its reverse (2412340013), we get a palindrome (33416661433).

The spelling of 31004321420 in words is "thirty-one billion, four million, three hundred twenty-one thousand, four hundred twenty".