31630020030 has 96 divisors (see below), whose sum is σ = 94848811200. Its totient is φ = 7163375616.

The previous prime is 31630020013. The next prime is 31630020041. The reversal of 31630020030 is 3002003613.

It is a happy number.

31630020030 is a `hidden beast` number, since 3 + 1 + 630 + 0 + 2 + 0 + 0 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31630019985 and 31630020012.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 161635 + ... + 298974.

It is an arithmetic number, because the mean of its divisors is an integer number (988008450).

Almost surely, 2^31630020030 is an apocalyptic number.

31630020030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31630020030 is an abundant number, since it is smaller than the sum of its proper divisors (63218791170).

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

31630020030 is a wasteful number, since it uses less digits than its factorization.

31630020030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460738 (or 460735 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 31630020030 its reverse (3002003613), we get a palindrome (34632023643).

The spelling of 31630020030 in words is "thirty-one billion, six hundred thirty million, twenty thousand, thirty".