20979261343222 has 48 divisors (see below), whose sum is σ = 40068839773872. Its totient is φ = 8163430793280.

The previous prime is 20979261343211. The next prime is 20979261343223. The reversal of 20979261343222 is 22234316297902.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20979261343222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20979261343223) 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, 134899648 + ... + 135055075.

It is an arithmetic number, because the mean of its divisors is an integer number (834767495289).

Almost surely, 2^{20979261343222} is an apocalyptic number.

20979261343222 is a deficient number, since it is larger than the sum of its proper divisors (19089578430650).

20979261343222 is a wasteful number, since it uses less digits than its factorization.

20979261343222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269954813 (or 269954806 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 20979261343222 in words is "twenty trillion, nine hundred seventy-nine billion, two hundred sixty-one million, three hundred forty-three thousand, two hundred twenty-two".