21141242320 has 160 divisors (see below), whose sum is σ = 54331772544. Its totient is φ = 7586611200.

The previous prime is 21141242293. The next prime is 21141242333. The reversal of 21141242320 is 2324214112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21141242291 and 21141242300.

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, 43057275 + ... + 43057765.

Almost surely, 2^21141242320 is an apocalyptic number.

21141242320 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 21141242320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27165886272).

21141242320 is an abundant number, since it is smaller than the sum of its proper divisors (33190530224).

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

21141242320 is a wasteful number, since it uses less digits than its factorization.

21141242320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061 (or 1055 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21141242320 its reverse (2324214112), we get a palindrome (23465456432).

The spelling of 21141242320 in words is "twenty-one billion, one hundred forty-one million, two hundred forty-two thousand, three hundred twenty".