20544332403 has 16 divisors (see below), whose sum is σ = 31734496256. Its totient is φ = 11578800960.

The previous prime is 20544332339. The next prime is 20544332437. The reversal of 20544332403 is 30423344502.

It is not a de Polignac number, because 20544332403 - 2⁶ = 20544332339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20544332503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6699163 + ... + 6702228.

It is an arithmetic number, because the mean of its divisors is an integer number (1983406016).

Almost surely, 2^20544332403 is an apocalyptic number.

20544332403 is a deficient number, since it is larger than the sum of its proper divisors (11190163853).

20544332403 is a wasteful number, since it uses less digits than its factorization.

20544332403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13401474.

The product of its (nonzero) digits is 34560, while the sum is 30.

Adding to 20544332403 its reverse (30423344502), we get a palindrome (50967676905).

The spelling of 20544332403 in words is "twenty billion, five hundred forty-four million, three hundred thirty-two thousand, four hundred three".