84824052021 has 24 divisors (see below), whose sum is σ = 122941274040. Its totient is φ = 56356857216.

The previous prime is 84824052013. The next prime is 84824052043. The reversal of 84824052021 is 12025042848.

84824052021 is a `hidden beast` number, since 8 + 48 + 2 + 405 + 202 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5575608900 + 79248443121 = 74670^2 + 281511^2 .

It is not a de Polignac number, because 84824052021 - 2³ = 84824052013 is a prime.

It is a super-2 number, since 2×84824052021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84824052121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4461291 + ... + 4480263.

It is an arithmetic number, because the mean of its divisors is an integer number (5122553085).

Almost surely, 2^84824052021 is an apocalyptic number.

It is an amenable number.

84824052021 is a deficient number, since it is larger than the sum of its proper divisors (38117222019).

84824052021 is a wasteful number, since it uses less digits than its factorization.

84824052021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20645 (or 20642 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

Adding to 84824052021 its reverse (12025042848), we get a palindrome (96849094869).

The spelling of 84824052021 in words is "eighty-four billion, eight hundred twenty-four million, fifty-two thousand, twenty-one".