30310020 has 72 divisors (see below), whose sum is σ = 99020376. Its totient is φ = 7460352.

The previous prime is 30310019. The next prime is 30310037. The reversal of 30310020 is 2001303.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 367236 + 29942784 = 606^2 + 5472^2 .

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 = 30309984 and 30310011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4137 + ... + 8816.

It is an arithmetic number, because the mean of its divisors is an integer number (1375283).

Almost surely, 2^30310020 is an apocalyptic number.

30310020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30310020 is an abundant number, since it is smaller than the sum of its proper divisors (68710356).

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

30310020 is a wasteful number, since it uses less digits than its factorization.

30310020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12981 (or 12976 counting only the distinct ones).

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

The square root of 30310020 is about 5505.4536597814. The cubic root of 30310020 is about 311.7899226841.

Adding to 30310020 its reverse (2001303), we get a palindrome (32311323).

The spelling of 30310020 in words is "thirty million, three hundred ten thousand, twenty".