20143384 has 16 divisors (see below), whose sum is σ = 38046600. Its totient is φ = 9997632.

The previous prime is 20143381. The next prime is 20143391. The reversal of 20143384 is 48334102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143381) 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, 8094 + ... + 10285.

Almost surely, 2^20143384 is an apocalyptic number.

It is an amenable number.

20143384 is a deficient number, since it is larger than the sum of its proper divisors (17903216).

20143384 is a wasteful number, since it uses less digits than its factorization.

20143384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18522 (or 18518 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20143384 is about 4488.1381440415. The cubic root of 20143384 is about 272.0888910736.

Adding to 20143384 its reverse (48334102), we get a palindrome (68477486).

The spelling of 20143384 in words is "twenty million, one hundred forty-three thousand, three hundred eighty-four".