20563338 has 8 divisors (see below), whose sum is σ = 41126688. Its totient is φ = 6854444.

The previous prime is 20563337. The next prime is 20563343. The reversal of 20563338 is 83336502.

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

20563338 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20563337) 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, 1713606 + ... + 1713617.

It is an arithmetic number, because the mean of its divisors is an integer number (5140836).

Almost surely, 2^20563338 is an apocalyptic number.

20563338 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.

20563338 is a wasteful number, since it uses less digits than its factorization.

20563338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427228.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20563338 is about 4534.6816867339. The cubic root of 20563338 is about 273.9667585368.

The spelling of 20563338 in words is "twenty million, five hundred sixty-three thousand, three hundred thirty-eight".