8205269421 has 4 divisors (see below), whose sum is σ = 10940359232. Its totient is φ = 5470179612.

The previous prime is 8205269411. The next prime is 8205269431. The reversal of 8205269421 is 1249625028.

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 an interprime number because it is at equal distance from previous prime (8205269411) and next prime (8205269431).

It is not a de Polignac number, because 8205269421 - 2¹¹ = 8205267373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8205269421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8205269411) 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, 1367544901 + ... + 1367544906.

It is an arithmetic number, because the mean of its divisors is an integer number (2735089808).

Almost surely, 2^8205269421 is an apocalyptic number.

It is an amenable number.

8205269421 is a deficient number, since it is larger than the sum of its proper divisors (2735089811).

8205269421 is a wasteful number, since it uses less digits than its factorization.

8205269421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735089810.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 8205269421 is about 90582.9422187202. The cubic root of 8205269421 is about 2016.9615316616.

The spelling of 8205269421 in words is "eight billion, two hundred five million, two hundred sixty-nine thousand, four hundred twenty-one".