31332011420 has 24 divisors (see below), whose sum is σ = 66031389648. Its totient is φ = 12488201600.

The previous prime is 31332011401. The next prime is 31332011461. The reversal of 31332011420 is 2411023313.

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 = 31332011392 and 31332011401.

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 7 ways as a sum of consecutive naturals, for example, 2781926 + ... + 2793165.

It is an arithmetic number, because the mean of its divisors is an integer number (2751307902).

Almost surely, 2^31332011420 is an apocalyptic number.

It is an amenable number.

31332011420 is an abundant number, since it is smaller than the sum of its proper divisors (34699378228).

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

31332011420 is a wasteful number, since it uses less digits than its factorization.

31332011420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5575381 (or 5575379 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31332011420 its reverse (2411023313), we get a palindrome (33743034733).

The spelling of 31332011420 in words is "thirty-one billion, three hundred thirty-two million, eleven thousand, four hundred twenty".