20190616 has 16 divisors (see below), whose sum is σ = 39850200. Its totient is φ = 9563904.

The previous prime is 20190613. The next prime is 20190631. The reversal of 20190616 is 61609102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20190613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66265 + ... + 66568.

Almost surely, 2^20190616 is an apocalyptic number.

It is an amenable number.

20190616 is a deficient number, since it is larger than the sum of its proper divisors (19659584).

20190616 is a wasteful number, since it uses less digits than its factorization.

20190616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132858 (or 132854 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 20190616 is about 4493.3969332789. The cubic root of 20190616 is about 272.3013888187.

Adding to 20190616 its reverse (61609102), we get a palindrome (81799718).

The spelling of 20190616 in words is "twenty million, one hundred ninety thousand, six hundred sixteen".