20461608 has 96 divisors (see below), whose sum is σ = 59740200. Its totient is φ = 6303744.

The previous prime is 20461607. The next prime is 20461619. The reversal of 20461608 is 80616402.

It can be written as a sum of positive squares in 4 ways, for example, as 20412324 + 49284 = 4518^2 + 222^2 .

It is not an unprimeable number, because it can be changed into a prime (20461603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89238 + ... + 89466.

Almost surely, 2^20461608 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 20461608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29870100).

20461608 is an abundant number, since it is smaller than the sum of its proper divisors (39278592).

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

20461608 is a wasteful number, since it uses less digits than its factorization.

20461608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20461608 is about 4523.4508950579. The cubic root of 20461608 is about 273.5142262162.

The spelling of 20461608 in words is "twenty million, four hundred sixty-one thousand, six hundred eight".