13279826021 has 8 divisors (see below), whose sum is σ = 16556666304. Its totient is φ = 10347916320.

The previous prime is 13279825991. The next prime is 13279826033. The reversal of 13279826021 is 12062897231.

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

It is a de Polignac number, because none of the positive numbers 2^k-13279826021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13279826021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13279526021) 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, 86232560 + ... + 86232713.

It is an arithmetic number, because the mean of its divisors is an integer number (2069583288).

Almost surely, 2^13279826021 is an apocalyptic number.

13279826021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13279826021 is a deficient number, since it is larger than the sum of its proper divisors (3276840283).

13279826021 is a wasteful number, since it uses less digits than its factorization.

13279826021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172465291.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 13279826021 in words is "thirteen billion, two hundred seventy-nine million, eight hundred twenty-six thousand, twenty-one".