8420020854 has 32 divisors (see below), whose sum is σ = 19608894720. Its totient is φ = 2360328672.

The previous prime is 8420020841. The next prime is 8420020859. The reversal of 8420020854 is 4580200248.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420020859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1889064 + ... + 1893515.

It is an arithmetic number, because the mean of its divisors is an integer number (612777960).

Almost surely, 2^8420020854 is an apocalyptic number.

8420020854 is an abundant number, since it is smaller than the sum of its proper divisors (11188873866).

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

8420020854 is a wasteful number, since it uses less digits than its factorization.

8420020854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782644.

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 8420020854 is about 91760.6716082658. The cubic root of 8420020854 is about 2034.4064420029.

The spelling of 8420020854 in words is "eight billion, four hundred twenty million, twenty thousand, eight hundred fifty-four".