20143340 has 24 divisors (see below), whose sum is σ = 48344352. Its totient is φ = 6906240.

The previous prime is 20143337. The next prime is 20143379. The reversal of 20143340 is 4334102.

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, 71801 + ... + 72080.

It is an arithmetic number, because the mean of its divisors is an integer number (2014348).

Almost surely, 2^20143340 is an apocalyptic number.

20143340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20143340 is an abundant number, since it is smaller than the sum of its proper divisors (28201012).

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

20143340 is a wasteful number, since it uses less digits than its factorization.

20143340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143897 (or 143895 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20143340 is about 4488.1332422289. The cubic root of 20143340 is about 272.0886929619.

Adding to 20143340 its reverse (4334102), we get a palindrome (24477442).

The spelling of 20143340 in words is "twenty million, one hundred forty-three thousand, three hundred forty".