20013144 has 32 divisors (see below), whose sum is σ = 50148720. Its totient is φ = 6655616.

The previous prime is 20013127. The next prime is 20013179. The reversal of 20013144 is 44131002.

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, 15034 + ... + 16310.

Almost surely, 2^20013144 is an apocalyptic number.

20013144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20013144 is an abundant number, since it is smaller than the sum of its proper divisors (30135576).

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

20013144 is a wasteful number, since it uses less digits than its factorization.

20013144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939 (or 1935 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20013144 is about 4473.6052575076. The cubic root of 20013144 is about 271.5012124796.

Adding to 20013144 its reverse (44131002), we get a palindrome (64144146).

The spelling of 20013144 in words is "twenty million, thirteen thousand, one hundred forty-four".