305123077020 has 96 divisors (see below), whose sum is σ = 901507138560. Its totient is φ = 76953986560.

The previous prime is 305123077009. The next prime is 305123077031. The reversal of 305123077020 is 20770321503.

It is an interprime number because it is at equal distance from previous prime (305123077009) and next prime (305123077031).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1119336 + ... + 1364975.

It is an arithmetic number, because the mean of its divisors is an integer number (9390699360).

Almost surely, 2^305123077020 is an apocalyptic number.

305123077020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

305123077020 is an abundant number, since it is smaller than the sum of its proper divisors (596384061540).

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

305123077020 is a wasteful number, since it uses less digits than its factorization.

305123077020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484435 (or 2484433 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 30.

Adding to 305123077020 its reverse (20770321503), we get a palindrome (325893398523).

The spelling of 305123077020 in words is "three hundred five billion, one hundred twenty-three million, seventy-seven thousand, twenty".