13845825821 has 8 divisors (see below), whose sum is σ = 14449527360. Its totient is φ = 13242266752.

The previous prime is 13845825817. The next prime is 13845825827. The reversal of 13845825821 is 12852854831.

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 13845825821 - 2² = 13845825817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13845825827) 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, 194765 + ... + 256173.

It is an arithmetic number, because the mean of its divisors is an integer number (1806190920).

Almost surely, 2^13845825821 is an apocalyptic number.

It is an amenable number.

13845825821 is a deficient number, since it is larger than the sum of its proper divisors (603701539).

13845825821 is an equidigital number, since it uses as much as digits as its factorization.

13845825821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71235.

The product of its digits is 614400, while the sum is 47.

The spelling of 13845825821 in words is "thirteen billion, eight hundred forty-five million, eight hundred twenty-five thousand, eight hundred twenty-one".