20349616 has 20 divisors (see below), whose sum is σ = 45060112. Its totient is φ = 8721216.

The previous prime is 20349613. The next prime is 20349643. The reversal of 20349616 is 61694302.

It is not an unprimeable number, because it can be changed into a prime (20349611) 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, 90735 + ... + 90958.

Almost surely, 2^20349616 is an apocalyptic number.

It is an amenable number.

20349616 is an abundant number, since it is smaller than the sum of its proper divisors (24710496).

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

20349616 is a wasteful number, since it uses less digits than its factorization.

20349616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181708 (or 181702 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 20349616 is about 4511.0548655497. The cubic root of 20349616 is about 273.0143068799.

The spelling of 20349616 in words is "twenty million, three hundred forty-nine thousand, six hundred sixteen".