20061616 has 10 divisors (see below), whose sum is σ = 38869412. Its totient is φ = 10030800.

The previous prime is 20061611. The next prime is 20061623. The reversal of 20061616 is 61616002.

It is not an unprimeable number, because it can be changed into a prime (20061611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626910 + ... + 626941.

Almost surely, 2^20061616 is an apocalyptic number.

It is an amenable number.

20061616 is a deficient number, since it is larger than the sum of its proper divisors (18807796).

20061616 is a wasteful number, since it uses less digits than its factorization.

20061616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253859 (or 1253853 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20061616 is about 4479.0195355680. The cubic root of 20061616 is about 271.7202284812.

Adding to 20061616 its reverse (61616002), we get a palindrome (81677618).

It can be divided in two parts, 200 and 61616, that added together give a palindrome (61816).

The spelling of 20061616 in words is "twenty million, sixty-one thousand, six hundred sixteen".