8420843454 has 64 divisors (see below), whose sum is σ = 17535163392. Its totient is φ = 2693980800.

The previous prime is 8420843449. The next prime is 8420843531. The reversal of 8420843454 is 4543480248.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8445684 + ... + 8446680.

It is an arithmetic number, because the mean of its divisors is an integer number (273986928).

Almost surely, 2^8420843454 is an apocalyptic number.

8420843454 is an abundant number, since it is smaller than the sum of its proper divisors (9114319938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8420843454 is a wasteful number, since it uses less digits than its factorization.

8420843454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601.

The product of its (nonzero) digits is 491520, while the sum is 42.

The square root of 8420843454 is about 91765.1538112371. The cubic root of 8420843454 is about 2034.4726907796.

The spelling of 8420843454 in words is "eight billion, four hundred twenty million, eight hundred forty-three thousand, four hundred fifty-four".