20042144 has 12 divisors (see below), whose sum is σ = 39458034. Its totient is φ = 10021056.

The previous prime is 20042117. The next prime is 20042173. The reversal of 20042144 is 44124002.

It can be written as a sum of positive squares in only one way, i.e., 19891600 + 150544 = 4460^2 + 388^2 .

It is a super-2 number, since 2×20042144² = 803375072233472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313127 + ... + 313190.

Almost surely, 2^20042144 is an apocalyptic number.

It is an amenable number.

20042144 is a deficient number, since it is larger than the sum of its proper divisors (19415890).

20042144 is an equidigital number, since it uses as much as digits as its factorization.

20042144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626327 (or 626319 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20042144 is about 4476.8453178550. The cubic root of 20042144 is about 271.6322885894.

Adding to 20042144 its reverse (44124002), we get a palindrome (64166146).

The spelling of 20042144 in words is "twenty million, forty-two thousand, one hundred forty-four".