31404304432420 has 72 divisors (see below), whose sum is σ = 70726560295104. Its totient is φ = 11690814858624.

The previous prime is 31404304432343. The next prime is 31404304432441. The reversal of 31404304432420 is 2423440340413.

It is a super-2 number, since 2×31404304432420² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24304602 + ... + 25564081.

It is an arithmetic number, because the mean of its divisors is an integer number (982313337432).

Almost surely, 2^{31404304432420} is an apocalyptic number.

It is an amenable number.

31404304432420 is an abundant number, since it is smaller than the sum of its proper divisors (39322255862684).

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

31404304432420 is a wasteful number, since it uses less digits than its factorization.

31404304432420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49868789 (or 49868750 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 31404304432420 its reverse (2423440340413), we get a palindrome (33827744772833).

The spelling of 31404304432420 in words is "thirty-one trillion, four hundred four billion, three hundred four million, four hundred thirty-two thousand, four hundred twenty".