20344818 has 64 divisors (see below), whose sum is σ = 47295360. Its totient is φ = 5778432.

The previous prime is 20344817. The next prime is 20344823. The reversal of 20344818 is 81844302.

It is not an unprimeable number, because it can be changed into a prime (20344813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88728 + ... + 88956.

It is an arithmetic number, because the mean of its divisors is an integer number (738990).

Almost surely, 2^20344818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20344818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23647680).

20344818 is an abundant number, since it is smaller than the sum of its proper divisors (26950542).

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

20344818 is a wasteful number, since it uses less digits than its factorization.

20344818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 20344818 is about 4510.5230295388. The cubic root of 20344818 is about 272.9928482341.

The spelling of 20344818 in words is "twenty million, three hundred forty-four thousand, eight hundred eighteen".