21032323013 has 16 divisors (see below), whose sum is σ = 23185451520. Its totient is φ = 18955992384.

The previous prime is 21032323001. The next prime is 21032323043. The reversal of 21032323013 is 31032323012.

It is a cyclic number.

It is not a de Polignac number, because 21032323013 - 2¹⁸ = 21032060869 is a prime.

It is a super-2 number, since 2×21032323013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032323043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2081708 + ... + 2091786.

It is an arithmetic number, because the mean of its divisors is an integer number (1449090720).

Almost surely, 2^21032323013 is an apocalyptic number.

It is an amenable number.

21032323013 is a deficient number, since it is larger than the sum of its proper divisors (2153128507).

21032323013 is a wasteful number, since it uses less digits than its factorization.

21032323013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13868.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21032323013 its reverse (31032323012), we get a palindrome (52064646025).

Subtracting 21032323013 from its reverse (31032323012), we obtain a palindrome (9999999999).

The spelling of 21032323013 in words is "twenty-one billion, thirty-two million, three hundred twenty-three thousand, thirteen".