20039868653 has 4 divisors (see below), whose sum is σ = 22902707040. Its totient is φ = 17177030268.

The previous prime is 20039868539. The next prime is 20039868679. The reversal of 20039868653 is 35686893002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35686893002 = 2 ⋅17843446501.

It is a cyclic number.

It is not a de Polignac number, because 20039868653 - 2⁸ = 20039868397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20039868853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1431419183 + ... + 1431419196.

It is an arithmetic number, because the mean of its divisors is an integer number (5725676760).

Almost surely, 2^20039868653 is an apocalyptic number.

It is an amenable number.

20039868653 is a deficient number, since it is larger than the sum of its proper divisors (2862838387).

20039868653 is an equidigital number, since it uses as much as digits as its factorization.

20039868653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862838386.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 20039868653 in words is "twenty billion, thirty-nine million, eight hundred sixty-eight thousand, six hundred fifty-three".