20672454163 has 8 divisors (see below), whose sum is σ = 21426202800. Its totient is φ = 19921432608.

The previous prime is 20672454139. The next prime is 20672454167. The reversal of 20672454163 is 36145427602.

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

It is not a de Polignac number, because 20672454163 - 2¹³ = 20672445971 is a prime.

It is a super-2 number, since 2×20672454163² (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 (20672454167) 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, 666328 + ... + 696661.

It is an arithmetic number, because the mean of its divisors is an integer number (2678275350).

Almost surely, 2^20672454163 is an apocalyptic number.

20672454163 is a deficient number, since it is larger than the sum of its proper divisors (753748637).

20672454163 is a wasteful number, since it uses less digits than its factorization.

20672454163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363541.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 20672454163 in words is "twenty billion, six hundred seventy-two million, four hundred fifty-four thousand, one hundred sixty-three".