20384223777 has 32 divisors (see below), whose sum is σ = 33170380800. Its totient is φ = 12314489616.

The previous prime is 20384223763. The next prime is 20384223803. The reversal of 20384223777 is 77732248302.

It is not a de Polignac number, because 20384223777 - 2¹⁰ = 20384222753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20384223757) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 852013 + ... + 875610.

It is an arithmetic number, because the mean of its divisors is an integer number (1036574400).

Almost surely, 2^20384223777 is an apocalyptic number.

20384223777 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20384223777 is a deficient number, since it is larger than the sum of its proper divisors (12786157023).

20384223777 is a wasteful number, since it uses less digits than its factorization.

20384223777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727674 (or 1727668 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 45.

The spelling of 20384223777 in words is "twenty billion, three hundred eighty-four million, two hundred twenty-three thousand, seven hundred seventy-seven".