20336838 has 16 divisors (see below), whose sum is σ = 40934640. Its totient is φ = 6735456.

The previous prime is 20336809. The next prime is 20336839. The reversal of 20336838 is 83863302.

It is a junction number, because it is equal to n+sod(n) for n = 20336799 and 20336808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20336839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9853 + ... + 11736.

It is an arithmetic number, because the mean of its divisors is an integer number (2558415).

Almost surely, 2^20336838 is an apocalyptic number.

20336838 is an abundant number, since it is smaller than the sum of its proper divisors (20597802).

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

20336838 is a wasteful number, since it uses less digits than its factorization.

20336838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21751.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 20336838 is about 4509.6383447013. The cubic root of 20336838 is about 272.9571508914.

The spelling of 20336838 in words is "twenty million, three hundred thirty-six thousand, eight hundred thirty-eight".