20144491719 has 32 divisors (see below), whose sum is σ = 29565043200. Its totient is φ = 12099177600.

The previous prime is 20144491699. The next prime is 20144491721. The reversal of 20144491719 is 91719444102.

It is not a de Polignac number, because 20144491719 - 2⁸ = 20144491463 is a prime.

It is a super-2 number, since 2×20144491719² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144491219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2262294 + ... + 2271180.

It is an arithmetic number, because the mean of its divisors is an integer number (923907600).

Almost surely, 2^20144491719 is an apocalyptic number.

20144491719 is a deficient number, since it is larger than the sum of its proper divisors (9420551481).

20144491719 is a wasteful number, since it uses less digits than its factorization.

20144491719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 20144491719 in words is "twenty billion, one hundred forty-four million, four hundred ninety-one thousand, seven hundred nineteen".