21342440130 has 64 divisors (see below), whose sum is σ = 56585779200. Its totient is φ = 5108425920.

The previous prime is 21342440123. The next prime is 21342440257. The reversal of 21342440130 is 3104424312.

It is a self number, because there is not a number n which added to its sum of digits gives 21342440130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383260 + ... + 435399.

It is an arithmetic number, because the mean of its divisors is an integer number (884152800).

Almost surely, 2^21342440130 is an apocalyptic number.

21342440130 is an abundant number, since it is smaller than the sum of its proper divisors (35243339070).

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

21342440130 is a wasteful number, since it uses less digits than its factorization.

21342440130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818759.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21342440130 its reverse (3104424312), we get a palindrome (24446864442).

The spelling of 21342440130 in words is "twenty-one billion, three hundred forty-two million, four hundred forty thousand, one hundred thirty".