305212305020 has 24 divisors (see below), whose sum is σ = 732509532384. Its totient is φ = 104644218816.

The previous prime is 305212304977. The next prime is 305212305107. The reversal of 305212305020 is 20503212503.

It is a super-2 number, since 2×305212305020² (a number of 24 digits) contains 22 as substring.

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, 1090043807 + ... + 1090044086.

It is an arithmetic number, because the mean of its divisors is an integer number (30521230516).

Almost surely, 2^305212305020 is an apocalyptic number.

It is an amenable number.

305212305020 is an abundant number, since it is smaller than the sum of its proper divisors (427297227364).

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

305212305020 is a wasteful number, since it uses less digits than its factorization.

305212305020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180087909 (or 2180087907 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 305212305020 its reverse (20503212503), we get a palindrome (325715517523).

The spelling of 305212305020 in words is "three hundred five billion, two hundred twelve million, three hundred five thousand, twenty".