21311454330 has 48 divisors (see below), whose sum is σ = 56077388640. Its totient is φ = 5614581984.

The previous prime is 21311454301. The next prime is 21311454347. The reversal of 21311454330 is 3345411312.

It is a happy number.

21311454330 is a `hidden beast` number, since 2 + 1 + 3 + 114 + 543 + 3 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21311454294 and 21311454303.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1419000 + ... + 1433939.

It is an arithmetic number, because the mean of its divisors is an integer number (1168278930).

Almost surely, 2^21311454330 is an apocalyptic number.

21311454330 is an abundant number, since it is smaller than the sum of its proper divisors (34765934310).

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

21311454330 is a wasteful number, since it uses less digits than its factorization.

21311454330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853035 (or 2853032 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21311454330 its reverse (3345411312), we get a palindrome (24656865642).

The spelling of 21311454330 in words is "twenty-one billion, three hundred eleven million, four hundred fifty-four thousand, three hundred thirty".