20542344 has 48 divisors (see below), whose sum is σ = 54223920. Its totient is φ = 6484320.

The previous prime is 20542343. The next prime is 20542349. The reversal of 20542344 is 44324502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20542343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7479 + ... + 9849.

It is an arithmetic number, because the mean of its divisors is an integer number (1129665).

Almost surely, 2^20542344 is an apocalyptic number.

20542344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20542344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27111960).

20542344 is an abundant number, since it is smaller than the sum of its proper divisors (33681576).

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

20542344 is a wasteful number, since it uses less digits than its factorization.

20542344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418 (or 2395 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 20542344 is about 4532.3662694006. The cubic root of 20542344 is about 273.8734919571.

Adding to 20542344 its reverse (44324502), we get a palindrome (64866846).

The spelling of 20542344 in words is "twenty million, five hundred forty-two thousand, three hundred forty-four".