20968342 has 4 divisors (see below), whose sum is σ = 31452516. Its totient is φ = 10484170.

The previous prime is 20968331. The next prime is 20968351. The reversal of 20968342 is 24386902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24386902 = 2 ⋅12193451.

It is a junction number, because it is equal to n+sod(n) for n = 20968298 and 20968307.

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 as a sum of consecutive naturals, namely, 5242084 + ... + 5242087.

It is an arithmetic number, because the mean of its divisors is an integer number (7863129).

Almost surely, 2^20968342 is an apocalyptic number.

20968342 is a deficient number, since it is larger than the sum of its proper divisors (10484174).

20968342 is a wasteful number, since it uses less digits than its factorization.

20968342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10484173.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 20968342 is about 4579.1202211779. The cubic root of 20968342 is about 275.7537097835.

The spelling of 20968342 in words is "twenty million, nine hundred sixty-eight thousand, three hundred forty-two".