20507466 has 64 divisors (see below), whose sum is σ = 49248000. Its totient is φ = 5569536.

The previous prime is 20507429. The next prime is 20507471. The reversal of 20507466 is 66470502.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 137560 + ... + 137708.

It is an arithmetic number, because the mean of its divisors is an integer number (769500).

Almost surely, 2^20507466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20507466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24624000).

20507466 is an abundant number, since it is smaller than the sum of its proper divisors (28740534).

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

20507466 is a wasteful number, since it uses less digits than its factorization.

20507466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20507466 is about 4528.5169757880. The cubic root of 20507466 is about 273.7184046436.

Adding to 20507466 its reverse (66470502), we get a palindrome (86977968).

The spelling of 20507466 in words is "twenty million, five hundred seven thousand, four hundred sixty-six".