21440324130 has 32 divisors (see below), whose sum is σ = 51460933824. Its totient is φ = 5716958016.

The previous prime is 21440324117. The next prime is 21440324209. The reversal of 21440324130 is 3142304412.

It is a self number, because there is not a number n which added to its sum of digits gives 21440324130.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519744 + ... + 559476.

It is an arithmetic number, because the mean of its divisors is an integer number (1608154182).

Almost surely, 2^21440324130 is an apocalyptic number.

21440324130 is an abundant number, since it is smaller than the sum of its proper divisors (30020609694).

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

21440324130 is a wasteful number, since it uses less digits than its factorization.

21440324130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57730.

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

Adding to 21440324130 its reverse (3142304412), we get a palindrome (24582628542).

The spelling of 21440324130 in words is "twenty-one billion, four hundred forty million, three hundred twenty-four thousand, one hundred thirty".