20455021432163 has 8 divisors (see below), whose sum is σ = 22032336427200. Its totient is φ = 18927779929128.

The previous prime is 20455021432103. The next prime is 20455021432193. The reversal of 20455021432163 is 36123412055402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20455021432163 - 2²⁸ = 20454752996707 is a prime.

It is a super-2 number, since 2×20455021432163² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20455021432103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12518372153 + ... + 12518373786.

It is an arithmetic number, because the mean of its divisors is an integer number (2754042053400).

Almost surely, 2^{20455021432163} is an apocalyptic number.

20455021432163 is a deficient number, since it is larger than the sum of its proper divisors (1577314995037).

20455021432163 is a wasteful number, since it uses less digits than its factorization.

20455021432163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25036746001.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 20455021432163 its reverse (36123412055402), we get a palindrome (56578433487565).

The spelling of 20455021432163 in words is "twenty trillion, four hundred fifty-five billion, twenty-one million, four hundred thirty-two thousand, one hundred sixty-three".