20444142 has 8 divisors (see below), whose sum is σ = 40888296. Its totient is φ = 6814712.

The previous prime is 20444113. The next prime is 20444147. The reversal of 20444142 is 24144402.

It is a sphenic number, since it is the product of 3 distinct primes.

20444142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703673 + ... + 1703684.

It is an arithmetic number, because the mean of its divisors is an integer number (5111037).

Almost surely, 2^20444142 is an apocalyptic number.

20444142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20444142 is a wasteful number, since it uses less digits than its factorization.

20444142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407362.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 20444142 is about 4521.5198772094. The cubic root of 20444142 is about 273.4363802751.

Adding to 20444142 its reverse (24144402), we get a palindrome (44588544).

The spelling of 20444142 in words is "twenty million, four hundred forty-four thousand, one hundred forty-two".