21143142144 has 54 divisors (see below), whose sum is σ = 60960897816. Its totient is φ = 7047713280.

The previous prime is 21143142121. The next prime is 21143142157. The reversal of 21143142144 is 44124134112.

21143142144 is a `hidden beast` number, since 2 + 11 + 431 + 4 + 214 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4586052 + ... + 4590659.

Almost surely, 2^21143142144 is an apocalyptic number.

21143142144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21143142144 is an abundant number, since it is smaller than the sum of its proper divisors (39817755672).

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

21143142144 is an equidigital number, since it uses as much as digits as its factorization.

21143142144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9176733 (or 9176716 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 21143142144 its reverse (44124134112), we get a palindrome (65267276256).

The spelling of 21143142144 in words is "twenty-one billion, one hundred forty-three million, one hundred forty-two thousand, one hundred forty-four".