21303143120 has 160 divisors (see below), whose sum is σ = 57988550400. Its totient is φ = 7127543808.

The previous prime is 21303143111. The next prime is 21303143149. The reversal of 21303143120 is 2134130312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21303143092 and 21303143101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4087076 + ... + 4092284.

It is an arithmetic number, because the mean of its divisors is an integer number (362428440).

Almost surely, 2^21303143120 is an apocalyptic number.

21303143120 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 21303143120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28994275200).

21303143120 is an abundant number, since it is smaller than the sum of its proper divisors (36685407280).

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

21303143120 is a wasteful number, since it uses less digits than its factorization.

21303143120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5405 (or 5399 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21303143120 its reverse (2134130312), we get a palindrome (23437273432).

The spelling of 21303143120 in words is "twenty-one billion, three hundred three million, one hundred forty-three thousand, one hundred twenty".