838413018421 has 4 divisors (see below), whose sum is σ = 914632383744. Its totient is φ = 762193653100.

The previous prime is 838413018407. The next prime is 838413018461. The reversal of 838413018421 is 124810314838.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 838413018421 - 2⁵ = 838413018389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838413018461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38109682645 + ... + 38109682666.

It is an arithmetic number, because the mean of its divisors is an integer number (228658095936).

Almost surely, 2^838413018421 is an apocalyptic number.

It is an amenable number.

838413018421 is a deficient number, since it is larger than the sum of its proper divisors (76219365323).

838413018421 is a wasteful number, since it uses less digits than its factorization.

838413018421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76219365322.

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 838413018421 in words is "eight hundred thirty-eight billion, four hundred thirteen million, eighteen thousand, four hundred twenty-one".