20444430 has 16 divisors (see below), whose sum is σ = 49066704. Its totient is φ = 5451840.

The previous prime is 20444429. The next prime is 20444471. The reversal of 20444430 is 3444402.

It is a junction number, because it is equal to n+sod(n) for n = 20444397 and 20444406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340711 + ... + 340770.

It is an arithmetic number, because the mean of its divisors is an integer number (3066669).

Almost surely, 2^20444430 is an apocalyptic number.

20444430 is an abundant number, since it is smaller than the sum of its proper divisors (28622274).

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

20444430 is a wasteful number, since it uses less digits than its factorization.

20444430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681491.

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

The square root of 20444430 is about 4521.5517247954. The cubic root of 20444430 is about 273.4376642502.

Adding to 20444430 its reverse (3444402), we get a palindrome (23888832).

The spelling of 20444430 in words is "twenty million, four hundred forty-four thousand, four hundred thirty".