20623643078 has 16 divisors (see below), whose sum is σ = 31015353600. Its totient is φ = 10285224456.

The previous prime is 20623643077. The next prime is 20623643093. The reversal of 20623643078 is 87034632602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20623643077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414775 + ... + 1429277.

It is an arithmetic number, because the mean of its divisors is an integer number (1938459600).

Almost surely, 2^20623643078 is an apocalyptic number.

20623643078 is a deficient number, since it is larger than the sum of its proper divisors (10391710522).

20623643078 is a wasteful number, since it uses less digits than its factorization.

20623643078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16291.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 20623643078 in words is "twenty billion, six hundred twenty-three million, six hundred forty-three thousand, seventy-eight".