20144646744919 has 2 divisors, whose sum is σ = 20144646744920. Its totient is φ = 20144646744918.

The previous prime is 20144646744883. The next prime is 20144646745009. The reversal of 20144646744919 is 91944764644102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20144646744919 - 2⁴³ = 11348553722711 is a prime.

It is a super-2 number, since 2×20144646744919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20144646744119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072323372459 + 10072323372460.

It is an arithmetic number, because the mean of its divisors is an integer number (10072323372460).

Almost surely, 2^{20144646744919} is an apocalyptic number.

20144646744919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20144646744919 is an equidigital number, since it uses as much as digits as its factorization.

20144646744919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 61.

The spelling of 20144646744919 in words is "twenty trillion, one hundred forty-four billion, six hundred forty-six million, seven hundred forty-four thousand, nine hundred nineteen".