21338455342 has 8 divisors (see below), whose sum is σ = 32033561976. Its totient is φ = 10660601352.

The previous prime is 21338455297. The next prime is 21338455357. The reversal of 21338455342 is 24355483312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21338455295 and 21338455304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4310068 + ... + 4315015.

It is an arithmetic number, because the mean of its divisors is an integer number (4004195247).

Almost surely, 2^21338455342 is an apocalyptic number.

21338455342 is a deficient number, since it is larger than the sum of its proper divisors (10695106634).

21338455342 is a wasteful number, since it uses less digits than its factorization.

21338455342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626322.

The product of its digits is 345600, while the sum is 40.

The spelling of 21338455342 in words is "twenty-one billion, three hundred thirty-eight million, four hundred fifty-five thousand, three hundred forty-two".