21050436142 has 8 divisors (see below), whose sum is σ = 32948508816. Its totient is φ = 10067599872.

The previous prime is 21050436139. The next prime is 21050436151. The reversal of 21050436142 is 24163405012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21050436142.

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 3 ways as a sum of consecutive naturals, for example, 228809043 + ... + 228809134.

It is an arithmetic number, because the mean of its divisors is an integer number (4118563602).

Almost surely, 2^21050436142 is an apocalyptic number.

21050436142 is a deficient number, since it is larger than the sum of its proper divisors (11898072674).

21050436142 is a wasteful number, since it uses less digits than its factorization.

21050436142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457618202.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 21050436142 in words is "twenty-one billion, fifty million, four hundred thirty-six thousand, one hundred forty-two".