20423040144 has 40 divisors (see below), whose sum is σ = 56817946752. Its totient is φ = 6284012160.

The previous prime is 20423040137. The next prime is 20423040149. The reversal of 20423040144 is 44104032402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20423040149) 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, 16363992 + ... + 16365239.

Almost surely, 2^20423040144 is an apocalyptic number.

20423040144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20423040144 is an abundant number, since it is smaller than the sum of its proper divisors (36394906608).

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

20423040144 is a wasteful number, since it uses less digits than its factorization.

20423040144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32729255 (or 32729249 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20423040144 its reverse (44104032402), we get a palindrome (64527072546).

The spelling of 20423040144 in words is "twenty billion, four hundred twenty-three million, forty thousand, one hundred forty-four".