21330423063 has 8 divisors (see below), whose sum is σ = 31600626800. Its totient is φ = 14220282024.

The previous prime is 21330423047. The next prime is 21330423071. The reversal of 21330423063 is 36032403312.

It is a happy number.

21330423063 is a `hidden beast` number, since 21 + 330 + 4 + 2 + 306 + 3 = 666.

It is not a de Polignac number, because 21330423063 - 2⁴ = 21330423047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 790015669 = 21330423063 / (2 + 1 + 3 + 3 + 0 + 4 + 2 + 3 + 0 + 6 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330423013) 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, 395007808 + ... + 395007861.

It is an arithmetic number, because the mean of its divisors is an integer number (3950078350).

Almost surely, 2^21330423063 is an apocalyptic number.

21330423063 is a deficient number, since it is larger than the sum of its proper divisors (10270203737).

21330423063 is an equidigital number, since it uses as much as digits as its factorization.

21330423063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790015678 (or 790015672 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 21330423063 its reverse (36032403312), we get a palindrome (57362826375).

The spelling of 21330423063 in words is "twenty-one billion, three hundred thirty million, four hundred twenty-three thousand, sixty-three".