21050342 has 8 divisors (see below), whose sum is σ = 31598616. Its totient is φ = 10517472.

The previous prime is 21050339. The next prime is 21050357. The reversal of 21050342 is 24305012.

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 21050342.

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, 593 + ... + 6515.

It is an arithmetic number, because the mean of its divisors is an integer number (3949827).

Almost surely, 2^21050342 is an apocalyptic number.

21050342 is a deficient number, since it is larger than the sum of its proper divisors (10548274).

21050342 is a wasteful number, since it uses less digits than its factorization.

21050342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7702.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 21050342 is about 4588.0651695459. The cubic root of 21050342 is about 276.1127016453.

Adding to 21050342 its reverse (24305012), we get a palindrome (45355354).

The spelling of 21050342 in words is "twenty-one million, fifty thousand, three hundred forty-two".