20396816386 has 4 divisors (see below), whose sum is σ = 30595224582. Its totient is φ = 10198408192.

The previous prime is 20396816347. The next prime is 20396816411. The reversal of 20396816386 is 68361869302.

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

It can be written as a sum of positive squares in only one way, i.e., 18762150625 + 1634665761 = 136975^2 + 40431^2 .

It is an unprimeable number.

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, 5099204095 + ... + 5099204098.

Almost surely, 2^20396816386 is an apocalyptic number.

20396816386 is a deficient number, since it is larger than the sum of its proper divisors (10198408196).

20396816386 is a wasteful number, since it uses less digits than its factorization.

20396816386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10198408195.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 20396816386 in words is "twenty billion, three hundred ninety-six million, eight hundred sixteen thousand, three hundred eighty-six".