20461568 has 48 divisors (see below), whose sum is σ = 41736240. Its totient is φ = 10027008.

The previous prime is 20461547. The next prime is 20461579. The reversal of 20461568 is 86516402.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198605 + ... + 198707.

It is an arithmetic number, because the mean of its divisors is an integer number (869505).

Almost surely, 2^20461568 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 20461568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20868120).

20461568 is an abundant number, since it is smaller than the sum of its proper divisors (21274672).

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

20461568 is an equidigital number, since it uses as much as digits as its factorization.

20461568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20461568 is about 4523.4464736526. The cubic root of 20461568 is about 273.5140479869.

The spelling of 20461568 in words is "twenty million, four hundred sixty-one thousand, five hundred sixty-eight".