209857483320 has 64 divisors (see below), whose sum is σ = 629695188000. Its totient is φ = 55951085568.

The previous prime is 209857483291. The next prime is 209857483333. The reversal of 209857483320 is 23384758902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457216 + ... + 792944.

Almost surely, 2^209857483320 is an apocalyptic number.

209857483320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209857483320 is an abundant number, since it is smaller than the sum of its proper divisors (419837704680).

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

209857483320 is a wasteful number, since it uses less digits than its factorization.

209857483320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340952 (or 340948 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 209857483320 in words is "two hundred nine billion, eight hundred fifty-seven million, four hundred eighty-three thousand, three hundred twenty".