22064646021 has 32 divisors (see below), whose sum is σ = 33835553280. Its totient is φ = 12649060800.

The previous prime is 22064646017. The next prime is 22064646067. The reversal of 22064646021 is 12064646022.

It is not a de Polignac number, because 22064646021 - 2² = 22064646017 is a prime.

It is a super-2 number, since 2×22064646021² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22064646091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382486 + ... + 436376.

It is an arithmetic number, because the mean of its divisors is an integer number (1057361040).

Almost surely, 2^22064646021 is an apocalyptic number.

It is an amenable number.

22064646021 is a deficient number, since it is larger than the sum of its proper divisors (11770907259).

22064646021 is a wasteful number, since it uses less digits than its factorization.

22064646021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54577.

The product of its (nonzero) digits is 27648, while the sum is 33.

Subtracting from 22064646021 its reverse (12064646022), we obtain a palindrome (9999999999).

The spelling of 22064646021 in words is "twenty-two billion, sixty-four million, six hundred forty-six thousand, twenty-one".