20644021622 has 32 divisors (see below), whose sum is σ = 35523256320. Its totient is φ = 8814126240.

The previous prime is 20644021613. The next prime is 20644021631. The reversal of 20644021622 is 22612044602.

It is an interprime number because it is at equal distance from previous prime (20644021613) and next prime (20644021631).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5000123 + ... + 5004249.

It is an arithmetic number, because the mean of its divisors is an integer number (1110101760).

Almost surely, 2^20644021622 is an apocalyptic number.

20644021622 is a deficient number, since it is larger than the sum of its proper divisors (14879234698).

20644021622 is a wasteful number, since it uses less digits than its factorization.

20644021622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5396.

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 20644021622 in words is "twenty billion, six hundred forty-four million, twenty-one thousand, six hundred twenty-two".