20344044 has 48 divisors (see below), whose sum is σ = 55415808. Its totient is φ = 5687808.

The previous prime is 20344039. The next prime is 20344057. The reversal of 20344044 is 44044302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20344044.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372 + ... + 6524.

It is an arithmetic number, because the mean of its divisors is an integer number (1154496).

Almost surely, 2^20344044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20344044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27707904).

20344044 is an abundant number, since it is smaller than the sum of its proper divisors (35071764).

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

20344044 is a wasteful number, since it uses less digits than its factorization.

20344044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5214 (or 5212 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 20344044 is about 4510.4372293604. The cubic root of 20344044 is about 272.9893862691.

Adding to 20344044 its reverse (44044302), we get a palindrome (64388346).

The spelling of 20344044 in words is "twenty million, three hundred forty-four thousand, forty-four".