31020000030 has 64 divisors (see below), whose sum is σ = 82742345280. Its totient is φ = 8269765632.

The previous prime is 31019999993. The next prime is 31020000041. The reversal of 31020000030 is 3000002013.

It is a happy number.

It is a super-2 number, since 2×31020000030² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 31019999967 and 31020000021.

It is a congruent number.

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, 1146822 + ... + 1173558.

It is an arithmetic number, because the mean of its divisors is an integer number (1292849145).

Almost surely, 2^31020000030 is an apocalyptic number.

31020000030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31020000030 is an abundant number, since it is smaller than the sum of its proper divisors (51722345250).

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

31020000030 is a wasteful number, since it uses less digits than its factorization.

31020000030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31050 (or 31044 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

Adding to 31020000030 its reverse (3000002013), we get a palindrome (34020002043).

The spelling of 31020000030 in words is "thirty-one billion, twenty million, thirty", and thus it is an aban number and an uban number.