20753757163 has 4 divisors (see below), whose sum is σ = 20858047600. Its totient is φ = 20649466728.

The previous prime is 20753757151. The next prime is 20753757179. The reversal of 20753757163 is 36175735702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20753757163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20753757103) 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, 52144920 + ... + 52145317.

It is an arithmetic number, because the mean of its divisors is an integer number (5214511900).

Almost surely, 2^20753757163 is an apocalyptic number.

20753757163 is a deficient number, since it is larger than the sum of its proper divisors (104290437).

20753757163 is a wasteful number, since it uses less digits than its factorization.

20753757163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104290436.

The product of its (nonzero) digits is 926100, while the sum is 46.

The spelling of 20753757163 in words is "twenty billion, seven hundred fifty-three million, seven hundred fifty-seven thousand, one hundred sixty-three".