20163436 has 12 divisors (see below), whose sum is σ = 35413560. Its totient is φ = 10045280.

The previous prime is 20163397. The next prime is 20163443. The reversal of 20163436 is 63436102.

It is a self number, because there is not a number n which added to its sum of digits gives 20163436.

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, 7846 + ... + 10093.

It is an arithmetic number, because the mean of its divisors is an integer number (2951130).

Almost surely, 2^20163436 is an apocalyptic number.

It is an amenable number.

20163436 is a deficient number, since it is larger than the sum of its proper divisors (15250124).

20163436 is a wasteful number, since it uses less digits than its factorization.

20163436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18224 (or 18222 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 20163436 is about 4490.3714768380. The cubic root of 20163436 is about 272.1791459691.

Adding to 20163436 its reverse (63436102), we get a palindrome (83599538).

The spelling of 20163436 in words is "twenty million, one hundred sixty-three thousand, four hundred thirty-six".