13821004774 has 4 divisors (see below), whose sum is σ = 20731507164. Its totient is φ = 6910502386.

The previous prime is 13821004763. The next prime is 13821004849. The reversal of 13821004774 is 47740012831.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3455251192 + ... + 3455251195.

It is an arithmetic number, because the mean of its divisors is an integer number (5182876791).

Almost surely, 2^13821004774 is an apocalyptic number.

13821004774 is a deficient number, since it is larger than the sum of its proper divisors (6910502390).

13821004774 is an equidigital number, since it uses as much as digits as its factorization.

13821004774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910502389.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 13821004774 in words is "thirteen billion, eight hundred twenty-one million, four thousand, seven hundred seventy-four".