20263216 has 10 divisors (see below), whose sum is σ = 39260012. Its totient is φ = 10131600.

The previous prime is 20263193. The next prime is 20263219. The reversal of 20263216 is 61236202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20263219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633210 + ... + 633241.

Almost surely, 2^20263216 is an apocalyptic number.

It is an amenable number.

20263216 is a deficient number, since it is larger than the sum of its proper divisors (18996796).

20263216 is a wasteful number, since it uses less digits than its factorization.

20263216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266459 (or 1266453 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20263216 is about 4501.4682049305. The cubic root of 20263216 is about 272.6273724884.

Adding to 20263216 its reverse (61236202), we get a palindrome (81499418).

The spelling of 20263216 in words is "twenty million, two hundred sixty-three thousand, two hundred sixteen".