20144420140231 has 4 divisors (see below), whose sum is σ = 20145291047464. Its totient is φ = 20143549233000.

The previous prime is 20144420140219. The next prime is 20144420140277. The reversal of 20144420140231 is 13204102444102.

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 20144420140231 - 2⁵ = 20144420140199 is a prime.

It is a super-2 number, since 2×20144420140231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20144420140231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144420140291) 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, 435418920 + ... + 435465181.

It is an arithmetic number, because the mean of its divisors is an integer number (5036322761866).

Almost surely, 2^{20144420140231} is an apocalyptic number.

20144420140231 is a deficient number, since it is larger than the sum of its proper divisors (870907233).

20144420140231 is an equidigital number, since it uses as much as digits as its factorization.

20144420140231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870907232.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 20144420140231 its reverse (13204102444102), we get a palindrome (33348522584333).

The spelling of 20144420140231 in words is "twenty trillion, one hundred forty-four billion, four hundred twenty million, one hundred forty thousand, two hundred thirty-one".