20641853795 has 4 divisors (see below), whose sum is σ = 24770224560. Its totient is φ = 16513483032.

The previous prime is 20641853779. The next prime is 20641853819. The reversal of 20641853795 is 59735814602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59735814602 = 2 ⋅29867907301.

It is a cyclic number.

It is not a de Polignac number, because 20641853795 - 2⁴ = 20641853779 is a prime.

It is a super-2 number, since 2×20641853795² (a number of 21 digits) contains 22 as substring.

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, 2064185375 + ... + 2064185384.

It is an arithmetic number, because the mean of its divisors is an integer number (6192556140).

It is a 1-persistent number, because it is pandigital, but 2⋅20641853795 = 41283707590 is not.

Almost surely, 2^20641853795 is an apocalyptic number.

20641853795 is a deficient number, since it is larger than the sum of its proper divisors (4128370765).

20641853795 is an equidigital number, since it uses as much as digits as its factorization.

20641853795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128370764.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 20641853795 in words is "twenty billion, six hundred forty-one million, eight hundred fifty-three thousand, seven hundred ninety-five".