13815804238 has 4 divisors (see below), whose sum is σ = 20723706360. Its totient is φ = 6907902118.

The previous prime is 13815804209. The next prime is 13815804253. The reversal of 13815804238 is 83240851831.

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

It is a junction number, because it is equal to n+sod(n) for n = 13815804194 and 13815804203.

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, 3453951058 + ... + 3453951061.

It is an arithmetic number, because the mean of its divisors is an integer number (5180926590).

Almost surely, 2^13815804238 is an apocalyptic number.

13815804238 is a deficient number, since it is larger than the sum of its proper divisors (6907902122).

13815804238 is an equidigital number, since it uses as much as digits as its factorization.

13815804238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6907902121.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 13815804238 in words is "thirteen billion, eight hundred fifteen million, eight hundred four thousand, two hundred thirty-eight".