20182638365858 has 8 divisors (see below), whose sum is σ = 31012346757420. Its totient is φ = 9845189446720.

The previous prime is 20182638365833. The next prime is 20182638365881. The reversal of 20182638365858 is 85856383628102.

It can be written as a sum of positive squares in 2 ways, for example, as 13111735146169 + 7070903219689 = 3621013^2 + 2659117^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20182638365794 and 20182638365803.

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, 123064868003 + ... + 123064868166.

Almost surely, 2^{20182638365858} is an apocalyptic number.

20182638365858 is a deficient number, since it is larger than the sum of its proper divisors (10829708391562).

20182638365858 is a wasteful number, since it uses less digits than its factorization.

20182638365858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246129736212.

The product of its (nonzero) digits is 132710400, while the sum is 65.

The spelling of 20182638365858 in words is "twenty trillion, one hundred eighty-two billion, six hundred thirty-eight million, three hundred sixty-five thousand, eight hundred fifty-eight".