20216334 has 8 divisors (see below), whose sum is σ = 40432680. Its totient is φ = 6738776.

The previous prime is 20216311. The next prime is 20216341. The reversal of 20216334 is 43361202.

It is a happy number.

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

20216334 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20216334.

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, 1684689 + ... + 1684700.

It is an arithmetic number, because the mean of its divisors is an integer number (5054085).

Almost surely, 2^20216334 is an apocalyptic number.

20216334 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20216334 is a wasteful number, since it uses less digits than its factorization.

20216334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369394.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20216334 is about 4496.2577773077. The cubic root of 20216334 is about 272.4169553079.

Adding to 20216334 its reverse (43361202), we get a palindrome (63577536).

The spelling of 20216334 in words is "twenty million, two hundred sixteen thousand, three hundred thirty-four".