31463046820 has 96 divisors (see below), whose sum is σ = 71948217600. Its totient is φ = 11512664064.

The previous prime is 31463046781. The next prime is 31463046851. The reversal of 31463046820 is 2864036413.

It is a super-2 number, since 2×31463046820² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31463046820.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1776529 + ... + 1794151.

It is an arithmetic number, because the mean of its divisors is an integer number (749460600).

Almost surely, 2^31463046820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31463046820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35974108800).

31463046820 is an abundant number, since it is smaller than the sum of its proper divisors (40485170780).

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

31463046820 is a wasteful number, since it uses less digits than its factorization.

31463046820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17797 (or 17795 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 31463046820 in words is "thirty-one billion, four hundred sixty-three million, forty-six thousand, eight hundred twenty".