21330010145 has 8 divisors (see below), whose sum is σ = 25599308904. Its totient is φ = 17061810304.

The previous prime is 21330010129. The next prime is 21330010151. The reversal of 21330010145 is 54101003312.

It can be written as a sum of positive squares in 4 ways, for example, as 953018641 + 20376991504 = 30871^2 + 142748^2 .

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 21330010145 - 2⁴ = 21330010129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231404 + ... + 310173.

It is an arithmetic number, because the mean of its divisors is an integer number (3199913613).

Almost surely, 2^21330010145 is an apocalyptic number.

It is an amenable number.

21330010145 is a deficient number, since it is larger than the sum of its proper divisors (4269298759).

21330010145 is an equidigital number, since it uses as much as digits as its factorization.

21330010145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549459.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21330010145 its reverse (54101003312), we get a palindrome (75431013457).

The spelling of 21330010145 in words is "twenty-one billion, three hundred thirty million, ten thousand, one hundred forty-five".