20384223778 has 4 divisors (see below), whose sum is σ = 30576335670. Its totient is φ = 10192111888.

The previous prime is 20384223763. The next prime is 20384223803. The reversal of 20384223778 is 87732248302.

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

It can be written as a sum of positive squares in only one way, i.e., 20384129529 + 94249 = 142773^2 + 307^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5096055943 + ... + 5096055946.

Almost surely, 2^20384223778 is an apocalyptic number.

20384223778 is a deficient number, since it is larger than the sum of its proper divisors (10192111892).

20384223778 is a wasteful number, since it uses less digits than its factorization.

20384223778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10192111891.

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 20384223778 in words is "twenty billion, three hundred eighty-four million, two hundred twenty-three thousand, seven hundred seventy-eight".