21144301342 has 16 divisors (see below), whose sum is σ = 32040172080. Its totient is φ = 10464689728.

The previous prime is 21144301309. The next prime is 21144301357. The reversal of 21144301342 is 24310344112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16117 + ... + 206272.

It is an arithmetic number, because the mean of its divisors is an integer number (2002510755).

Almost surely, 2^21144301342 is an apocalyptic number.

21144301342 is a deficient number, since it is larger than the sum of its proper divisors (10895870738).

21144301342 is a wasteful number, since it uses less digits than its factorization.

21144301342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222875.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21144301342 its reverse (24310344112), we get a palindrome (45454645454).

The spelling of 21144301342 in words is "twenty-one billion, one hundred forty-four million, three hundred one thousand, three hundred forty-two".