21110020342 has 8 divisors (see below), whose sum is σ = 31689792000. Its totient is φ = 10546756344.

The previous prime is 21110020339. The next prime is 21110020429. The reversal of 21110020342 is 24302001112.

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

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, 4123717 + ... + 4128832.

It is an arithmetic number, because the mean of its divisors is an integer number (3961224000).

Almost surely, 2^21110020342 is an apocalyptic number.

21110020342 is a deficient number, since it is larger than the sum of its proper divisors (10579771658).

21110020342 is a wasteful number, since it uses less digits than its factorization.

21110020342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8253830.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21110020342 its reverse (24302001112), we get a palindrome (45412021454).

The spelling of 21110020342 in words is "twenty-one billion, one hundred ten million, twenty thousand, three hundred forty-two".