20532216 has 32 divisors (see below), whose sum is σ = 51528960. Its totient is φ = 6817632.

The previous prime is 20532191. The next prime is 20532227. The reversal of 20532216 is 61223502.

It is a junction number, because it is equal to n+sod(n) for n = 20532192 and 20532201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5281 + ... + 8303.

It is an arithmetic number, because the mean of its divisors is an integer number (1610280).

Almost surely, 2^20532216 is an apocalyptic number.

It is an amenable number.

20532216 is an abundant number, since it is smaller than the sum of its proper divisors (30996744).

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

20532216 is a wasteful number, since it uses less digits than its factorization.

20532216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3315 (or 3311 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20532216 is about 4531.2488344826. The cubic root of 20532216 is about 273.8284752393.

Adding to 20532216 its reverse (61223502), we get a palindrome (81755718).

The spelling of 20532216 in words is "twenty million, five hundred thirty-two thousand, two hundred sixteen".