20206416 has 20 divisors (see below), whose sum is σ = 52200032. Its totient is φ = 6735456.

The previous prime is 20206391. The next prime is 20206427. The reversal of 20206416 is 61460202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20206392 and 20206401.

It is a congruent number.

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, 210436 + ... + 210531.

Almost surely, 2^20206416 is an apocalyptic number.

It is an amenable number.

20206416 is an abundant number, since it is smaller than the sum of its proper divisors (31993616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20206416 is a wasteful number, since it uses less digits than its factorization.

20206416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420978 (or 420972 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20206416 is about 4495.1547248120. The cubic root of 20206416 is about 272.3723993675.

Adding to 20206416 its reverse (61460202), we get a palindrome (81666618).

The spelling of 20206416 in words is "twenty million, two hundred six thousand, four hundred sixteen".