31304401020 has 96 divisors (see below), whose sum is σ = 97989239040. Its totient is φ = 8296603200.

The previous prime is 31304401019. The next prime is 31304401067. The reversal of 31304401020 is 2010440313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31304400984 and 31304401002.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 89806 + ... + 265845.

It is an arithmetic number, because the mean of its divisors is an integer number (1020721240).

Almost surely, 2^31304401020 is an apocalyptic number.

31304401020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31304401020 is an abundant number, since it is smaller than the sum of its proper divisors (66684838020).

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

31304401020 is a wasteful number, since it uses less digits than its factorization.

31304401020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355832 (or 355824 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31304401020 its reverse (2010440313), we get a palindrome (33314841333).

The spelling of 31304401020 in words is "thirty-one billion, three hundred four million, four hundred one thousand, twenty".