20207400163 has 4 divisors (see below), whose sum is σ = 21270947560. Its totient is φ = 19143852768.

The previous prime is 20207400151. The next prime is 20207400167. The reversal of 20207400163 is 36100470202.

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-20207400163 is a prime.

It is a super-2 number, since 2×20207400163² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20207400167) 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, 531773670 + ... + 531773707.

It is an arithmetic number, because the mean of its divisors is an integer number (5317736890).

Almost surely, 2^20207400163 is an apocalyptic number.

20207400163 is a deficient number, since it is larger than the sum of its proper divisors (1063547397).

20207400163 is a wasteful number, since it uses less digits than its factorization.

20207400163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063547396.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 20207400163 its reverse (36100470202), we get a palindrome (56307870365).

The spelling of 20207400163 in words is "twenty billion, two hundred seven million, four hundred thousand, one hundred sixty-three".