30331040020 has 24 divisors (see below), whose sum is σ = 63778915368. Its totient is φ = 12116467200.

The previous prime is 30331040017. The next prime is 30331040071. The reversal of 30331040020 is 2004013303.

It can be written as a sum of positive squares in 4 ways, for example, as 120428676 + 30210611344 = 10974^2 + 173812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30331039976 and 30331040003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981201 + ... + 1011640.

It is an arithmetic number, because the mean of its divisors is an integer number (2657454807).

Almost surely, 2^30331040020 is an apocalyptic number.

It is an amenable number.

30331040020 is an abundant number, since it is smaller than the sum of its proper divisors (33447875348).

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

30331040020 is a wasteful number, since it uses less digits than its factorization.

30331040020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993611 (or 1993609 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 30331040020 its reverse (2004013303), we get a palindrome (32335053323).

The spelling of 30331040020 in words is "thirty billion, three hundred thirty-one million, forty thousand, twenty".