20243386 has 4 divisors (see below), whose sum is σ = 30365082. Its totient is φ = 10121692.

The previous prime is 20243383. The next prime is 20243387. The reversal of 20243386 is 68334202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68334202 = 2 ⋅34167101.

It can be written as a sum of positive squares in only one way, i.e., 20079361 + 164025 = 4481^2 + 405^2 .

It is not an unprimeable number, because it can be changed into a prime (20243383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060845 + ... + 5060848.

Almost surely, 2^20243386 is an apocalyptic number.

20243386 is a deficient number, since it is larger than the sum of its proper divisors (10121696).

20243386 is a wasteful number, since it uses less digits than its factorization.

20243386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10121695.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20243386 is about 4499.2650510945. The cubic root of 20243386 is about 272.5384105438.

Adding to 20243386 its reverse (68334202), we get a palindrome (88577588).

The spelling of 20243386 in words is "twenty million, two hundred forty-three thousand, three hundred eighty-six".