20838738 has 16 divisors (see below), whose sum is σ = 41801760. Its totient is φ = 6925536.

The previous prime is 20838721. The next prime is 20838751. The reversal of 20838738 is 83783802.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20838696 and 20838705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2923 + ... + 7086.

It is an arithmetic number, because the mean of its divisors is an integer number (2612610).

Almost surely, 2^20838738 is an apocalyptic number.

20838738 is an abundant number, since it is smaller than the sum of its proper divisors (20963022).

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

20838738 is a wasteful number, since it uses less digits than its factorization.

20838738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10361.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 20838738 is about 4564.9466590531. The cubic root of 20838738 is about 275.1843964388.

The spelling of 20838738 in words is "twenty million, eight hundred thirty-eight thousand, seven hundred thirty-eight".