13821005553 has 8 divisors (see below), whose sum is σ = 18429590208. Its totient is φ = 9213212304.

The previous prime is 13821005503. The next prime is 13821005573. The reversal of 13821005553 is 35550012831.

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

It is not a de Polignac number, because 13821005553 - 2⁹ = 13821005041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13821005503) 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, 155826 + ... + 227867.

It is an arithmetic number, because the mean of its divisors is an integer number (2303698776).

Almost surely, 2^13821005553 is an apocalyptic number.

It is an amenable number.

13821005553 is a deficient number, since it is larger than the sum of its proper divisors (4608584655).

13821005553 is a wasteful number, since it uses less digits than its factorization.

13821005553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395703.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 13821005553 in words is "thirteen billion, eight hundred twenty-one million, five thousand, five hundred fifty-three".