20522460 has 96 divisors (see below), whose sum is σ = 66350592. Its totient is φ = 4642560.

The previous prime is 20522449. The next prime is 20522477. The reversal of 20522460 is 6422502.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent 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, 54834 + ... + 55206.

It is an arithmetic number, because the mean of its divisors is an integer number (691152).

Almost surely, 2^20522460 is an apocalyptic number.

20522460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20522460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33175296).

20522460 is an abundant number, since it is smaller than the sum of its proper divisors (45828132).

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

20522460 is a wasteful number, since it uses less digits than its factorization.

20522460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20522460 is about 4530.1721821582. The cubic root of 20522460 is about 273.7850979789.

Adding to 20522460 its reverse (6422502), we get a palindrome (26944962).

The spelling of 20522460 in words is "twenty million, five hundred twenty-two thousand, four hundred sixty".