212018386 has 8 divisors (see below), whose sum is σ = 318176460. Its totient is φ = 105959568.

The previous prime is 212018377. The next prime is 212018419. The reversal of 212018386 is 683810212.

It can be written as a sum of positive squares in 2 ways, for example, as 206640625 + 5377761 = 14375^2 + 2319^2 .

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, 19221 + ... + 28168.

Almost surely, 2^212018386 is an apocalyptic number.

212018386 is a deficient number, since it is larger than the sum of its proper divisors (106158074).

212018386 is a wasteful number, since it uses less digits than its factorization.

212018386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49628.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 212018386 is about 14560.8511427045. The cubic root of 212018386 is about 596.2904328216.

Adding to 212018386 its reverse (683810212), we get a palindrome (895828598).

The spelling of 212018386 in words is "two hundred twelve million, eighteen thousand, three hundred eighty-six".