20403254163 has 8 divisors (see below), whose sum is σ = 27270854800. Its totient is φ = 13568911488.

The previous prime is 20403254149. The next prime is 20403254189. The reversal of 20403254163 is 36145230402.

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

It is not a de Polignac number, because 20403254163 - 2⁴ = 20403254147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20403254163.

It is not an unprimeable number, because it can be changed into a prime (20403254363) 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, 8313058 + ... + 8315511.

It is an arithmetic number, because the mean of its divisors is an integer number (3408856850).

Almost surely, 2^20403254163 is an apocalyptic number.

20403254163 is a deficient number, since it is larger than the sum of its proper divisors (6867600637).

20403254163 is a wasteful number, since it uses less digits than its factorization.

20403254163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16628981.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 20403254163 its reverse (36145230402), we get a palindrome (56548484565).

The spelling of 20403254163 in words is "twenty billion, four hundred three million, two hundred fifty-four thousand, one hundred sixty-three".