20216936 has 16 divisors (see below), whose sum is σ = 38831940. Its totient is φ = 9861760.

The previous prime is 20216921. The next prime is 20216939. The reversal of 20216936 is 63961202.

It can be written as a sum of positive squares in 2 ways, for example, as 16240900 + 3976036 = 4030^2 + 1994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20216899 and 20216908.

It is not an unprimeable number, because it can be changed into a prime (20216939) 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, 30491 + ... + 31146.

Almost surely, 2^20216936 is an apocalyptic number.

It is an amenable number.

20216936 is a deficient number, since it is larger than the sum of its proper divisors (18615004).

20216936 is a wasteful number, since it uses less digits than its factorization.

20216936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61684 (or 61680 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20216936 is about 4496.3247213697. The cubic root of 20216936 is about 272.4196592828.

The spelling of 20216936 in words is "twenty million, two hundred sixteen thousand, nine hundred thirty-six".