21342342208 has 28 divisors (see below), whose sum is σ = 46201321872. Its totient is φ = 9701064320.

The previous prime is 21342342193. The next prime is 21342342239. The reversal of 21342342208 is 80224324312.

It is a self number, because there is not a number n which added to its sum of digits gives 21342342208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15157210 + ... + 15158617.

Almost surely, 2^21342342208 is an apocalyptic number.

It is an amenable number.

21342342208 is an abundant number, since it is smaller than the sum of its proper divisors (24858979664).

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

21342342208 is a wasteful number, since it uses less digits than its factorization.

21342342208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30315850 (or 30315840 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 21342342208 in words is "twenty-one billion, three hundred forty-two million, three hundred forty-two thousand, two hundred eight".