20318838 has 8 divisors (see below), whose sum is σ = 40637688. Its totient is φ = 6772944.

The previous prime is 20318819. The next prime is 20318839. The reversal of 20318838 is 83881302.

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

20318838 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 20318799 and 20318808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20318839) 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, 1693231 + ... + 1693242.

It is an arithmetic number, because the mean of its divisors is an integer number (5079711).

Almost surely, 2^20318838 is an apocalyptic number.

20318838 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.

20318838 is a wasteful number, since it uses less digits than its factorization.

20318838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386478.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 20318838 is about 4507.6421774582. The cubic root of 20318838 is about 272.8765962679.

The spelling of 20318838 in words is "twenty million, three hundred eighteen thousand, eight hundred thirty-eight".