20644229067 has 32 divisors (see below), whose sum is σ = 34426059264. Its totient is φ = 10690406400.

The previous prime is 20644229041. The next prime is 20644229083. The reversal of 20644229067 is 76092244602.

It is not a de Polignac number, because 20644229067 - 2¹⁴ = 20644212683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20644229017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67734 + ... + 214187.

It is an arithmetic number, because the mean of its divisors is an integer number (1075814352).

Almost surely, 2^20644229067 is an apocalyptic number.

20644229067 is a deficient number, since it is larger than the sum of its proper divisors (13781830197).

20644229067 is a wasteful number, since it uses less digits than its factorization.

20644229067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282259.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 20644229067 in words is "twenty billion, six hundred forty-four million, two hundred twenty-nine thousand, sixty-seven".