20402000144 has 20 divisors (see below), whose sum is σ = 39531191196. Its totient is φ = 10200402432.

The previous prime is 20402000137. The next prime is 20402000149. The reversal of 20402000144 is 44100020402.

It can be written as a sum of positive squares in 2 ways, for example, as 7222960144 + 13179040000 = 84988^2 + 114800^2 .

It is not an unprimeable number, because it can be changed into a prime (20402000149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398132 + ... + 446444.

Almost surely, 2^20402000144 is an apocalyptic number.

It is an amenable number.

20402000144 is a deficient number, since it is larger than the sum of its proper divisors (19129191052).

20402000144 is a wasteful number, since it uses less digits than its factorization.

20402000144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74714 (or 74708 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20402000144 its reverse (44100020402), we get a palindrome (64502020546).

The spelling of 20402000144 in words is "twenty billion, four hundred two million, one hundred forty-four", and thus it is an aban number.