20950064 has 40 divisors (see below), whose sum is σ = 42400560. Its totient is φ = 10015488.

The previous prime is 20950063. The next prime is 20950081. The reversal of 20950064 is 46005902.

20950064 = T₃₇ + T₃₈ + ... + T₅₀₀.

It is not an unprimeable number, because it can be changed into a prime (20950063) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 75494 + ... + 75770.

It is an arithmetic number, because the mean of its divisors is an integer number (1060014).

Almost surely, 2^20950064 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 20950064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21200280).

20950064 is an abundant number, since it is smaller than the sum of its proper divisors (21450496).

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

20950064 is a wasteful number, since it uses less digits than its factorization.

20950064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20950064 is about 4577.1239878334. The cubic root of 20950064 is about 275.6735621092.

Adding to 20950064 its reverse (46005902), we get a palindrome (66955966).

The spelling of 20950064 in words is "twenty million, nine hundred fifty thousand, sixty-four".