21330346043 has 8 divisors (see below), whose sum is σ = 22170782928. Its totient is φ = 20503800864.

The previous prime is 21330346031. The next prime is 21330346057. The reversal of 21330346043 is 34064303312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21330346043 - 2⁶ = 21330345979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21330345997 and 21330346015.

It is not an unprimeable number, because it can be changed into a prime (21330346013) 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, 3469796 + ... + 3475937.

It is an arithmetic number, because the mean of its divisors is an integer number (2771347866).

Almost surely, 2^21330346043 is an apocalyptic number.

21330346043 is a deficient number, since it is larger than the sum of its proper divisors (840436885).

21330346043 is an equidigital number, since it uses as much as digits as its factorization.

21330346043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6945853.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 21330346043 its reverse (34064303312), we get a palindrome (55394649355).

The spelling of 21330346043 in words is "twenty-one billion, three hundred thirty million, three hundred forty-six thousand, forty-three".