20347616 has 48 divisors (see below), whose sum is σ = 41658624. Its totient is φ = 9777024.

The previous prime is 20347597. The next prime is 20347619. The reversal of 20347616 is 61674302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20347619) 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, 124751 + ... + 124913.

It is an arithmetic number, because the mean of its divisors is an integer number (867888).

Almost surely, 2^20347616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20347616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20829312).

20347616 is an abundant number, since it is smaller than the sum of its proper divisors (21311008).

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

20347616 is a wasteful number, since it uses less digits than its factorization.

20347616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20347616 is about 4510.8331824620. The cubic root of 20347616 is about 273.0053624605.

The spelling of 20347616 in words is "twenty million, three hundred forty-seven thousand, six hundred sixteen".