20464576 has 56 divisors (see below), whose sum is σ = 45445680. Its totient is φ = 9062400.

The previous prime is 20464573. The next prime is 20464637. The reversal of 20464576 is 67546402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20464573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28510 + ... + 29218.

It is an arithmetic number, because the mean of its divisors is an integer number (811530).

Almost surely, 2^20464576 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 20464576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22722840).

20464576 is an abundant number, since it is smaller than the sum of its proper divisors (24981104).

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

20464576 is a wasteful number, since it uses less digits than its factorization.

20464576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 20464576 is about 4523.7789512751. The cubic root of 20464576 is about 273.5274501846.

The spelling of 20464576 in words is "twenty million, four hundred sixty-four thousand, five hundred seventy-six".