20838536 has 16 divisors (see below), whose sum is σ = 39141900. Its totient is φ = 10400704.

The previous prime is 20838527. The next prime is 20838569. The reversal of 20838536 is 63583802.

It can be written as a sum of positive squares in 2 ways, for example, as 20340100 + 498436 = 4510^2 + 706^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20838496 and 20838505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3230 + ... + 7218.

Almost surely, 2^20838536 is an apocalyptic number.

It is an amenable number.

20838536 is a deficient number, since it is larger than the sum of its proper divisors (18303364).

20838536 is a wasteful number, since it uses less digits than its factorization.

20838536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648 (or 4644 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 20838536 is about 4564.9245338779. The cubic root of 20838536 is about 275.1835072706.

The spelling of 20838536 in words is "twenty million, eight hundred thirty-eight thousand, five hundred thirty-six".