20013204144 has 20 divisors (see below), whose sum is σ = 51700777496. Its totient is φ = 6671068032.

The previous prime is 20013204139. The next prime is 20013204149. The reversal of 20013204144 is 44140231002.

It is an interprime number because it is at equal distance from previous prime (20013204139) and next prime (20013204149).

It is a self number, because there is not a number n which added to its sum of digits gives 20013204144.

It is not an unprimeable number, because it can be changed into a prime (20013204149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208470829 + ... + 208470924.

Almost surely, 2^20013204144 is an apocalyptic number.

20013204144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20013204144 is an abundant number, since it is smaller than the sum of its proper divisors (31687573352).

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

20013204144 is a wasteful number, since it uses less digits than its factorization.

20013204144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416941764 (or 416941758 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20013204144 its reverse (44140231002), we get a palindrome (64153435146).

The spelling of 20013204144 in words is "twenty billion, thirteen million, two hundred four thousand, one hundred forty-four".