21162534421063 has 8 divisors (see below), whose sum is σ = 24225208365728. Its totient is φ = 18109724161824.

The previous prime is 21162534421051. The next prime is 21162534421081. The reversal of 21162534421063 is 36012443526112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21162534421063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21162534421013) 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, 2465916756 + ... + 2465925337.

It is an arithmetic number, because the mean of its divisors is an integer number (3028151045716).

Almost surely, 2^{21162534421063} is an apocalyptic number.

21162534421063 is a deficient number, since it is larger than the sum of its proper divisors (3062673944665).

21162534421063 is an equidigital number, since it uses as much as digits as its factorization.

21162534421063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4931842713.

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 21162534421063 its reverse (36012443526112), we get a palindrome (57174977947175).

The spelling of 21162534421063 in words is "twenty-one trillion, one hundred sixty-two billion, five hundred thirty-four million, four hundred twenty-one thousand, sixty-three".