207683853021 has 48 divisors (see below), whose sum is σ = 311440409280. Its totient is φ = 133278324480.

The previous prime is 207683852993. The next prime is 207683853037. The reversal of 207683853021 is 120358386702.

207683853021 is a `hidden beast` number, since 2 + 0 + 7 + 68 + 38 + 530 + 21 = 666.

It is not a de Polignac number, because 207683853021 - 2¹³ = 207683844829 is a prime.

It is a super-4 number, since 4×207683853021⁴ (a number of 46 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207683853721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7355551 + ... + 7383731.

It is an arithmetic number, because the mean of its divisors is an integer number (6488341860).

Almost surely, 2^207683853021 is an apocalyptic number.

It is an amenable number.

207683853021 is a deficient number, since it is larger than the sum of its proper divisors (103756556259).

207683853021 is a wasteful number, since it uses less digits than its factorization.

207683853021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28506 (or 28503 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 207683853021 in words is "two hundred seven billion, six hundred eighty-three million, eight hundred fifty-three thousand, twenty-one".