21140344330 has 32 divisors (see below), whose sum is σ = 43507575936. Its totient is φ = 7244973504.

The previous prime is 21140344279. The next prime is 21140344331. The reversal of 21140344330 is 3344304112.

21140344330 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21140344295 and 21140344304.

It is not an unprimeable number, because it can be changed into a prime (21140344331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99952 + ... + 228628.

It is an arithmetic number, because the mean of its divisors is an integer number (1359611748).

Almost surely, 2^21140344330 is an apocalyptic number.

21140344330 is an abundant number, since it is smaller than the sum of its proper divisors (22367231606).

21140344330 is a wasteful number, since it uses less digits than its factorization.

21140344330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131038.

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

Adding to 21140344330 its reverse (3344304112), we get a palindrome (24484648442).

The spelling of 21140344330 in words is "twenty-one billion, one hundred forty million, three hundred forty-four thousand, three hundred thirty".