21320043145313 has 8 divisors (see below), whose sum is σ = 23269031618976. Its totient is φ = 19372855127200.

The previous prime is 21320043145309. The next prime is 21320043145319. The reversal of 21320043145313 is 31354134002312.

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 21320043145313 - 2² = 21320043145309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21320043145313.

It is not an unprimeable number, because it can be changed into a prime (21320043145319) 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, 450089123 + ... + 450136488.

It is an arithmetic number, because the mean of its divisors is an integer number (2908628952372).

Almost surely, 2^{21320043145313} is an apocalyptic number.

It is an amenable number.

21320043145313 is a deficient number, since it is larger than the sum of its proper divisors (1948988473663).

21320043145313 is a wasteful number, since it uses less digits than its factorization.

21320043145313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900227775.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 21320043145313 its reverse (31354134002312), we get a palindrome (52674177147625).

The spelling of 21320043145313 in words is "twenty-one trillion, three hundred twenty billion, forty-three million, one hundred forty-five thousand, three hundred thirteen".