20071616 has 14 divisors (see below), whose sum is σ = 39829740. Its totient is φ = 10035776.

The previous prime is 20071613. The next prime is 20071631. The reversal of 20071616 is 61617002.

It is a junction number, because it is equal to n+sod(n) for n = 20071591 and 20071600.

It is not an unprimeable number, because it can be changed into a prime (20071613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156746 + ... + 156873.

Almost surely, 2^20071616 is an apocalyptic number.

It is an amenable number.

20071616 is a deficient number, since it is larger than the sum of its proper divisors (19758124).

20071616 is an equidigital number, since it uses as much as digits as its factorization.

20071616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313631 (or 313621 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20071616 is about 4480.1357122302. The cubic root of 20071616 is about 271.7653685958.

Adding to 20071616 its reverse (61617002), we get a palindrome (81688618).

The spelling of 20071616 in words is "twenty million, seventy-one thousand, six hundred sixteen".