31401047020 has 48 divisors (see below), whose sum is σ = 75377756160. Its totient is φ = 10763895744.

The previous prime is 31401047011. The next prime is 31401047081. The reversal of 31401047020 is 2074010413.

It is a junction number, because it is equal to n+sod(n) for n = 31401046982 and 31401047000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 770721 + ... + 810439.

It is an arithmetic number, because the mean of its divisors is an integer number (1570369920).

Almost surely, 2^31401047020 is an apocalyptic number.

It is an amenable number.

31401047020 is an abundant number, since it is smaller than the sum of its proper divisors (43976709140).

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

31401047020 is a wasteful number, since it uses less digits than its factorization.

31401047020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45382 (or 45380 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 31401047020 its reverse (2074010413), we get a palindrome (33475057433).

The spelling of 31401047020 in words is "thirty-one billion, four hundred one million, forty-seven thousand, twenty".