20143860 has 96 divisors (see below), whose sum is σ = 64253952. Its totient is φ = 4667520.

The previous prime is 20143859. The next prime is 20143867. The reversal of 20143860 is 6834102.

It is a happy number.

It is a super-3 number, since 3×20143860³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20143860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14517 + ... + 15843.

It is an arithmetic number, because the mean of its divisors is an integer number (669312).

Almost surely, 2^20143860 is an apocalyptic number.

20143860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20143860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32126976).

20143860 is an abundant number, since it is smaller than the sum of its proper divisors (44110092).

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

20143860 is a wasteful number, since it uses less digits than its factorization.

20143860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1371 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20143860 is about 4488.1911723990. The cubic root of 20143860 is about 272.0910342635.

Adding to 20143860 its reverse (6834102), we get a palindrome (26977962).

The spelling of 20143860 in words is "twenty million, one hundred forty-three thousand, eight hundred sixty".