21143310430 has 64 divisors (see below), whose sum is σ = 42992337600. Its totient is φ = 7415941120.

The previous prime is 21143310413. The next prime is 21143310437. The reversal of 21143310430 is 3401334112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143310437) 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, 3917814 + ... + 3923206.

It is an arithmetic number, because the mean of its divisors is an integer number (671755275).

Almost surely, 2^21143310430 is an apocalyptic number.

21143310430 is an abundant number, since it is smaller than the sum of its proper divisors (21849027170).

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

21143310430 is a wasteful number, since it uses less digits than its factorization.

21143310430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6669.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21143310430 its reverse (3401334112), we get a palindrome (24544644542).

The spelling of 21143310430 in words is "twenty-one billion, one hundred forty-three million, three hundred ten thousand, four hundred thirty".