20464444 has 96 divisors (see below), whose sum is σ = 50803200. Its totient is φ = 6946560.

The previous prime is 20464439. The next prime is 20464471. The reversal of 20464444 is 44446402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75942 + ... + 76210.

It is an arithmetic number, because the mean of its divisors is an integer number (529200).

Almost surely, 2^20464444 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 20464444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25401600).

20464444 is an abundant number, since it is smaller than the sum of its proper divisors (30338756).

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

20464444 is a wasteful number, since it uses less digits than its factorization.

20464444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 20464444 is about 4523.7643616793. The cubic root of 20464444 is about 273.5268620838.

It can be divided in two parts, 20 and 464444, that added together give a palindrome (464464).

The spelling of 20464444 in words is "twenty million, four hundred sixty-four thousand, four hundred forty-four".