20147616 has 72 divisors (see below), whose sum is σ = 59439744. Its totient is φ = 6713280.

The previous prime is 20147597. The next prime is 20147623. The reversal of 20147616 is 61674102.

20147616 is a `hidden beast` number, since 2 + 0 + 1 + 47 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20147616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6481 + ... + 9071.

It is an arithmetic number, because the mean of its divisors is an integer number (825552).

Almost surely, 2^20147616 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 20147616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29719872).

20147616 is an abundant number, since it is smaller than the sum of its proper divisors (39292128).

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

20147616 is an equidigital number, since it uses as much as digits as its factorization.

20147616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616 (or 2596 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20147616 is about 4488.6095842699. The cubic root of 20147616 is about 272.1079444686.

The spelling of 20147616 in words is "twenty million, one hundred forty-seven thousand, six hundred sixteen".