20493067718 has 4 divisors (see below), whose sum is σ = 30739601580. Its totient is φ = 10246533858.

The previous prime is 20493067717. The next prime is 20493067723. The reversal of 20493067718 is 81776039402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20493067711) 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 as a sum of consecutive naturals, namely, 5123266928 + ... + 5123266931.

It is an arithmetic number, because the mean of its divisors is an integer number (7684900395).

Almost surely, 2^20493067718 is an apocalyptic number.

20493067718 is a deficient number, since it is larger than the sum of its proper divisors (10246533862).

20493067718 is a wasteful number, since it uses less digits than its factorization.

20493067718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10246533861.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 20493067718 in words is "twenty billion, four hundred ninety-three million, sixty-seven thousand, seven hundred eighteen".