20786846018 has 8 divisors (see below), whose sum is σ = 31180887948. Its totient is φ = 10393216704.

The previous prime is 20786845991. The next prime is 20786846027. The reversal of 20786846018 is 81064868702.

It can be written as a sum of positive squares in 2 ways, for example, as 19158158569 + 1628687449 = 138413^2 + 40357^2 .

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

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, 115430 + ... + 234302.

Almost surely, 2^20786846018 is an apocalyptic number.

20786846018 is a deficient number, since it is larger than the sum of its proper divisors (10394041930).

20786846018 is a wasteful number, since it uses less digits than its factorization.

20786846018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206308.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 20786846018 in words is "twenty billion, seven hundred eighty-six million, eight hundred forty-six thousand, eighteen".