20518396 has 12 divisors (see below), whose sum is σ = 36742552. Its totient is φ = 10020528.

The previous prime is 20518391. The next prime is 20518397. The reversal of 20518396 is 69381502.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20518391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59475 + ... + 59818.

Almost surely, 2^20518396 is an apocalyptic number.

It is an amenable number.

20518396 is a deficient number, since it is larger than the sum of its proper divisors (16224156).

20518396 is a wasteful number, since it uses less digits than its factorization.

20518396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119340 (or 119338 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 20518396 is about 4529.7236118774. The cubic root of 20518396 is about 273.7670245106.

Adding to 20518396 its reverse (69381502), we get a palindrome (89899898).

The spelling of 20518396 in words is "twenty million, five hundred eighteen thousand, three hundred ninety-six".