20534216 has 16 divisors (see below), whose sum is σ = 40176000. Its totient is φ = 9820624.

The previous prime is 20534207. The next prime is 20534237. The reversal of 20534216 is 61243502.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 20534191 and 20534200.

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, 55616 + ... + 55983.

It is an arithmetic number, because the mean of its divisors is an integer number (2511000).

Almost surely, 2^20534216 is an apocalyptic number.

It is an amenable number.

20534216 is a deficient number, since it is larger than the sum of its proper divisors (19641784).

20534216 is a wasteful number, since it uses less digits than its factorization.

20534216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111628 (or 111624 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20534216 is about 4531.4695188206. The cubic root of 20534216 is about 273.8373659693.

Adding to 20534216 its reverse (61243502), we get a palindrome (81777718).

It can be divided in two parts, 20534 and 216, that multiplied together give a palindrome (4435344).

The spelling of 20534216 in words is "twenty million, five hundred thirty-four thousand, two hundred sixteen".