20423014443140 has 24 divisors (see below), whose sum is σ = 43125282439512. Its totient is φ = 8124072042240.

The previous prime is 20423014443101. The next prime is 20423014443149. The reversal of 20423014443140 is 4134441032402.

It can be written as a sum of positive squares in 4 ways, for example, as 1883651941444 + 18539362501696 = 1372462^2 + 4305736^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20423014443097 and 20423014443106.

It is not an unprimeable number, because it can be changed into a prime (20423014443149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2820854729 + ... + 2820861968.

It is an arithmetic number, because the mean of its divisors is an integer number (1796886768313).

Almost surely, 2^{20423014443140} is an apocalyptic number.

20423014443140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423014443140 is an abundant number, since it is smaller than the sum of its proper divisors (22702267996372).

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

20423014443140 is a wasteful number, since it uses less digits than its factorization.

20423014443140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641716887 (or 5641716885 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 20423014443140 its reverse (4134441032402), we get a palindrome (24557455475542).

The spelling of 20423014443140 in words is "twenty trillion, four hundred twenty-three billion, fourteen million, four hundred forty-three thousand, one hundred forty".