853446021 has 16 divisors (see below), whose sum is σ = 1148045184. Its totient is φ = 563919104.

The previous prime is 853445987. The next prime is 853446023. The reversal of 853446021 is 120644358.

It is a cyclic number.

It is not a de Polignac number, because 853446021 - 2¹¹ = 853443973 is a prime.

It is a super-2 number, since 2×853446021² = 1456740221521464882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853446023) 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, 351016 + ... + 353438.

It is an arithmetic number, because the mean of its divisors is an integer number (71752824).

Almost surely, 2^853446021 is an apocalyptic number.

It is an amenable number.

853446021 is a deficient number, since it is larger than the sum of its proper divisors (294599163).

853446021 is a wasteful number, since it uses less digits than its factorization.

853446021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 853446021 is about 29213.7984692166. The cubic root of 853446021 is about 948.5466312354.

The spelling of 853446021 in words is "eight hundred fifty-three million, four hundred forty-six thousand, twenty-one".