20544230442 has 32 divisors (see below), whose sum is σ = 41976963072. Its totient is φ = 6700092464.

The previous prime is 20544230419. The next prime is 20544230449. The reversal of 20544230442 is 24403244502.

It is not an unprimeable number, because it can be changed into a prime (20544230449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950083 + ... + 971465.

It is an arithmetic number, because the mean of its divisors is an integer number (1311780096).

Almost surely, 2^20544230442 is an apocalyptic number.

20544230442 is an abundant number, since it is smaller than the sum of its proper divisors (21432732630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20544230442 is a wasteful number, since it uses less digits than its factorization.

20544230442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24842.

The product of its (nonzero) digits is 30720, while the sum is 30.

Adding to 20544230442 its reverse (24403244502), we get a palindrome (44947474944).

It can be divided in two parts, 20544 and 230442, that added together give a triangular number (250986 = T₇₀₈).

The spelling of 20544230442 in words is "twenty billion, five hundred forty-four million, two hundred thirty thousand, four hundred forty-two".