20019144449 has 8 divisors (see below), whose sum is σ = 20071123488. Its totient is φ = 19967205280.

The previous prime is 20019144437. The next prime is 20019144463. The reversal of 20019144449 is 94444191002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20019144449 - 2¹⁶ = 20019078913 is a prime.

It is a super-2 number, since 2×20019144449² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20019144419) 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, 1173509 + ... + 1190445.

It is an arithmetic number, because the mean of its divisors is an integer number (2508890436).

Almost surely, 2^20019144449 is an apocalyptic number.

It is an amenable number.

20019144449 is a deficient number, since it is larger than the sum of its proper divisors (51979039).

20019144449 is a wasteful number, since it uses less digits than its factorization.

20019144449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19935.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 20019144449 in words is "twenty billion, nineteen million, one hundred forty-four thousand, four hundred forty-nine".