31420432032400 has 30 divisors (see below), whose sum is σ = 75487587958802. Its totient is φ = 12568172812800.

The previous prime is 31420432032389. The next prime is 31420432032421. The reversal of 31420432032400 is 423023402413.

It can be written as a sum of positive squares in 3 ways, for example, as 5241736986256 + 26178695046144 = 2289484^2 + 5116512^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 39275539641 + ... + 39275540440.

Almost surely, 2^{31420432032400} is an apocalyptic number.

It is an amenable number.

31420432032400 is an abundant number, since it is smaller than the sum of its proper divisors (44067155926402).

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

31420432032400 is a wasteful number, since it uses less digits than its factorization.

31420432032400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78551080099 (or 78551080088 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 31420432032400 its reverse (423023402413), we get a palindrome (31843455434813).

The spelling of 31420432032400 in words is "thirty-one trillion, four hundred twenty billion, four hundred thirty-two million, thirty-two thousand, four hundred".