20489238 has 48 divisors (see below), whose sum is σ = 55351296. Its totient is φ = 5321520.

The previous prime is 20489237. The next prime is 20489257. The reversal of 20489238 is 83298402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20489237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6006 + ... + 8777.

It is an arithmetic number, because the mean of its divisors is an integer number (1153152).

Almost surely, 2^20489238 is an apocalyptic number.

20489238 is an abundant number, since it is smaller than the sum of its proper divisors (34862058).

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

20489238 is a wasteful number, since it uses less digits than its factorization.

20489238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14809 (or 14806 counting only the distinct ones).

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

The square root of 20489238 is about 4526.5039489655. The cubic root of 20489238 is about 273.6372826746.

The spelling of 20489238 in words is "twenty million, four hundred eighty-nine thousand, two hundred thirty-eight".