21343030144 has 64 divisors (see below), whose sum is σ = 45168354000. Its totient is φ = 10016980992.

The previous prime is 21343030141. The next prime is 21343030147. The reversal of 21343030144 is 44103034312.

It is an interprime number because it is at equal distance from previous prime (21343030141) and next prime (21343030147).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343030141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224832 + ... + 305344.

Almost surely, 2^21343030144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21343030144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22584177000).

21343030144 is an abundant number, since it is smaller than the sum of its proper divisors (23825323856).

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

21343030144 is a wasteful number, since it uses less digits than its factorization.

21343030144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80655 (or 80643 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21343030144 its reverse (44103034312), we get a palindrome (65446064456).

The spelling of 21343030144 in words is "twenty-one billion, three hundred forty-three million, thirty thousand, one hundred forty-four".