309759985020 has 24 divisors (see below), whose sum is σ = 867327958224. Its totient is φ = 82602662656.

The previous prime is 309759984977. The next prime is 309759985057. The reversal of 309759985020 is 20589957903.

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 7 ways as a sum of consecutive naturals, for example, 2581333149 + ... + 2581333268.

It is an arithmetic number, because the mean of its divisors is an integer number (36138664926).

Almost surely, 2^309759985020 is an apocalyptic number.

309759985020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

309759985020 is an abundant number, since it is smaller than the sum of its proper divisors (557567973204).

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

309759985020 is a wasteful number, since it uses less digits than its factorization.

309759985020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5162666429 (or 5162666427 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 57.

The spelling of 309759985020 in words is "three hundred nine billion, seven hundred fifty-nine million, nine hundred eighty-five thousand, twenty".