20849238 has 80 divisors (see below), whose sum is σ = 49640976. Its totient is φ = 6531840.

The previous prime is 20849237. The next prime is 20849263. The reversal of 20849238 is 83294802.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20849237) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 285570 + ... + 285642.

Almost surely, 2^20849238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20849238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24820488).

20849238 is an abundant number, since it is smaller than the sum of its proper divisors (28791738).

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

20849238 is a wasteful number, since it uses less digits than its factorization.

20849238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 20849238 is about 4566.0965824214. The cubic root of 20849238 is about 275.2306076664.

The spelling of 20849238 in words is "twenty million, eight hundred forty-nine thousand, two hundred thirty-eight".