13340405021 has 8 divisors (see below), whose sum is σ = 13370897664. Its totient is φ = 13309941600.

The previous prime is 13340405017. The next prime is 13340405027. The reversal of 13340405021 is 12050404331.

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 13340405021 - 2² = 13340405017 is a prime.

It is a super-2 number, since 2×13340405021² (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 (13340405027) 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, 1087106 + ... + 1099308.

It is an arithmetic number, because the mean of its divisors is an integer number (1671362208).

Almost surely, 2^13340405021 is an apocalyptic number.

It is an amenable number.

13340405021 is a deficient number, since it is larger than the sum of its proper divisors (30492643).

13340405021 is a wasteful number, since it uses less digits than its factorization.

13340405021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14611.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 13340405021 its reverse (12050404331), we get a palindrome (25390809352).

The spelling of 13340405021 in words is "thirteen billion, three hundred forty million, four hundred five thousand, twenty-one".