21853342 has 8 divisors (see below), whose sum is σ = 37462896. Its totient is φ = 9365712.

The previous prime is 21853309. The next prime is 21853343. The reversal of 21853342 is 24335812.

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 21853342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21853343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780463 + ... + 780490.

It is an arithmetic number, because the mean of its divisors is an integer number (4682862).

Almost surely, 2^21853342 is an apocalyptic number.

21853342 is a deficient number, since it is larger than the sum of its proper divisors (15609554).

21853342 is a wasteful number, since it uses less digits than its factorization.

21853342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560962.

The product of its digits is 5760, while the sum is 28.

The square root of 21853342 is about 4674.7558225003. The cubic root of 21853342 is about 279.5799057467.

The spelling of 21853342 in words is "twenty-one million, eight hundred fifty-three thousand, three hundred forty-two".