8420840033 has 8 divisors (see below), whose sum is σ = 8866399200. Its totient is φ = 7975516608.

The previous prime is 8420840009. The next prime is 8420840039. The reversal of 8420840033 is 3300480248.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8420840033 - 2²² = 8416645729 is a prime.

It is a super-2 number, since 2×8420840033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8420840039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16910 + ... + 130872.

It is an arithmetic number, because the mean of its divisors is an integer number (1108299900).

Almost surely, 2^8420840033 is an apocalyptic number.

It is an amenable number.

8420840033 is a deficient number, since it is larger than the sum of its proper divisors (445559167).

8420840033 is a wasteful number, since it uses less digits than its factorization.

8420840033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117871.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 8420840033 is about 91765.1351712621. The cubic root of 8420840033 is about 2034.4724152754.

The spelling of 8420840033 in words is "eight billion, four hundred twenty million, eight hundred forty thousand, thirty-three".