21320231413 has 8 divisors (see below), whose sum is σ = 23250886400. Its totient is φ = 19431096048.

The previous prime is 21320231389. The next prime is 21320231453. The reversal of 21320231413 is 31413202312.

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

It is not a de Polignac number, because 21320231413 - 2⁵ = 21320231381 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 (21320231453) 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, 10378833 + ... + 10380886.

It is an arithmetic number, because the mean of its divisors is an integer number (2906360800).

Almost surely, 2^21320231413 is an apocalyptic number.

It is an amenable number.

21320231413 is a deficient number, since it is larger than the sum of its proper divisors (1930654987).

21320231413 is a wasteful number, since it uses less digits than its factorization.

21320231413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20759811.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21320231413 its reverse (31413202312), we get a palindrome (52733433725).

The spelling of 21320231413 in words is "twenty-one billion, three hundred twenty million, two hundred thirty-one thousand, four hundred thirteen".