20345144144 has 20 divisors (see below), whose sum is σ = 42450926196. Its totient is φ = 9390066432.

The previous prime is 20345144137. The next prime is 20345144167. The reversal of 20345144144 is 44144154302.

It can be written as a sum of positive squares in 2 ways, for example, as 13101091600 + 7244052544 = 114460^2 + 85112^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20345144144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48906389 + ... + 48906804.

Almost surely, 2^20345144144 is an apocalyptic number.

It is an amenable number.

20345144144 is an abundant number, since it is smaller than the sum of its proper divisors (22105782052).

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

20345144144 is a wasteful number, since it uses less digits than its factorization.

20345144144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97813214 (or 97813208 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 20345144144 its reverse (44144154302), we get a palindrome (64489298446).

The spelling of 20345144144 in words is "twenty billion, three hundred forty-five million, one hundred forty-four thousand, one hundred forty-four".