30312000020 has 24 divisors (see below), whose sum is σ = 65850208200. Its totient is φ = 11706703232.

The previous prime is 30312000001. The next prime is 30312000023. The reversal of 30312000020 is 2000021303.

It can be written as a sum of positive squares in 4 ways, for example, as 8760585604 + 21551414416 = 93598^2 + 146804^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30311999965 and 30312000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312000023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26130455 + ... + 26131614.

It is an arithmetic number, because the mean of its divisors is an integer number (2743758675).

Almost surely, 2^30312000020 is an apocalyptic number.

It is an amenable number.

30312000020 is an abundant number, since it is smaller than the sum of its proper divisors (35538208180).

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

30312000020 is a wasteful number, since it uses less digits than its factorization.

30312000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52262107 (or 52262105 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

Adding to 30312000020 its reverse (2000021303), we get a palindrome (32312021323).

The spelling of 30312000020 in words is "thirty billion, three hundred twelve million, twenty", and thus it is an aban number.