20544161003 has 4 divisors (see below), whose sum is σ = 21752641080. Its totient is φ = 19335680928.

The previous prime is 20544160991. The next prime is 20544161081. The reversal of 20544161003 is 30016144502.

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

It is a cyclic number.

It is not a de Polignac number, because 20544161003 - 2¹² = 20544156907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20544161503) 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, 604240013 + ... + 604240046.

It is an arithmetic number, because the mean of its divisors is an integer number (5438160270).

Almost surely, 2^20544161003 is an apocalyptic number.

20544161003 is a deficient number, since it is larger than the sum of its proper divisors (1208480077).

20544161003 is a wasteful number, since it uses less digits than its factorization.

20544161003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208480076.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 20544161003 in words is "twenty billion, five hundred forty-four million, one hundred sixty-one thousand, three".