20703986687998 has 4 divisors (see below), whose sum is σ = 31055980032000. Its totient is φ = 10351993343998.

The previous prime is 20703986687987. The next prime is 20703986687999. The reversal of 20703986687998 is 89978668930702.

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 (20703986687999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5175996671998 + ... + 5175996672001.

It is an arithmetic number, because the mean of its divisors is an integer number (7763995008000).

Almost surely, 2^{20703986687998} is an apocalyptic number.

20703986687998 is a deficient number, since it is larger than the sum of its proper divisors (10351993344002).

20703986687998 is a wasteful number, since it uses less digits than its factorization.

20703986687998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10351993344001.

The product of its (nonzero) digits is 3950456832, while the sum is 82.

The spelling of 20703986687998 in words is "twenty trillion, seven hundred three billion, nine hundred eighty-six million, six hundred eighty-seven thousand, nine hundred ninety-eight".