20355917822 has 4 divisors (see below), whose sum is σ = 30533876736. Its totient is φ = 10177958910.

The previous prime is 20355917819. The next prime is 20355917837. The reversal of 20355917822 is 22871955302.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5088979454 + ... + 5088979457.

It is an arithmetic number, because the mean of its divisors is an integer number (7633469184).

Almost surely, 2^20355917822 is an apocalyptic number.

20355917822 is a deficient number, since it is larger than the sum of its proper divisors (10177958914).

20355917822 is a wasteful number, since it uses less digits than its factorization.

20355917822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10177958913.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 20355917822 in words is "twenty billion, three hundred fifty-five million, nine hundred seventeen thousand, eight hundred twenty-two".