20386777798 has 8 divisors (see below), whose sum is σ = 30813603480. Its totient is φ = 10115576640.

The previous prime is 20386777759. The next prime is 20386777823. The reversal of 20386777798 is 89777768302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38905803 + ... + 38906326.

It is an arithmetic number, because the mean of its divisors is an integer number (3851700435).

Almost surely, 2^20386777798 is an apocalyptic number.

20386777798 is a deficient number, since it is larger than the sum of its proper divisors (10426825682).

20386777798 is a wasteful number, since it uses less digits than its factorization.

20386777798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77812262.

The product of its (nonzero) digits is 49787136, while the sum is 64.

The spelling of 20386777798 in words is "twenty billion, three hundred eighty-six million, seven hundred seventy-seven thousand, seven hundred ninety-eight".