20740216 has 32 divisors (see below), whose sum is σ = 44605440. Its totient is φ = 8856288.

The previous prime is 20740201. The next prime is 20740217. The reversal of 20740216 is 61204702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20965 + ... + 21931.

It is an arithmetic number, because the mean of its divisors is an integer number (1393920).

Almost surely, 2^20740216 is an apocalyptic number.

It is an amenable number.

20740216 is an abundant number, since it is smaller than the sum of its proper divisors (23865224).

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

20740216 is a wasteful number, since it uses less digits than its factorization.

20740216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20740216 is about 4554.1427294278. The cubic root of 20740216 is about 274.7500362228.

Adding to 20740216 its reverse (61204702), we get a palindrome (81944918).

The spelling of 20740216 in words is "twenty million, seven hundred forty thousand, two hundred sixteen".