20352183385 has 4 divisors (see below), whose sum is σ = 24422620068. Its totient is φ = 16281746704.

The previous prime is 20352183373. The next prime is 20352183391. The reversal of 20352183385 is 58338125302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58338125302 = 2 ⋅29169062651.

It can be written as a sum of positive squares in 2 ways, for example, as 12045501504 + 8306681881 = 109752^2 + 91141^2 .

It is a cyclic number.

It is not a de Polignac number, because 20352183385 - 2³³ = 11762248793 is a prime.

It is a super-2 number, since 2×20352183385² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035218334 + ... + 2035218343.

It is an arithmetic number, because the mean of its divisors is an integer number (6105655017).

Almost surely, 2^20352183385 is an apocalyptic number.

It is an amenable number.

20352183385 is a deficient number, since it is larger than the sum of its proper divisors (4070436683).

20352183385 is an equidigital number, since it uses as much as digits as its factorization.

20352183385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070436682.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 20352183385 in words is "twenty billion, three hundred fifty-two million, one hundred eighty-three thousand, three hundred eighty-five".