20838474 has 48 divisors (see below), whose sum is σ = 47163168. Its totient is φ = 6643296.

The previous prime is 20838469. The next prime is 20838491. The reversal of 20838474 is 47483802.

20838474 is a `hidden beast` number, since 208 + 384 + 74 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44389 + ... + 44855.

It is an arithmetic number, because the mean of its divisors is an integer number (982566).

Almost surely, 2^20838474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20838474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23581584).

20838474 is an abundant number, since it is smaller than the sum of its proper divisors (26324694).

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

20838474 is a wasteful number, since it uses less digits than its factorization.

20838474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 20838474 is about 4564.9177429610. The cubic root of 20838474 is about 275.1832343564.

It can be divided in two parts, 20838 and 474, that added together give a palindrome (21312).

The spelling of 20838474 in words is "twenty million, eight hundred thirty-eight thousand, four hundred seventy-four".