20975460 has 96 divisors (see below), whose sum is σ = 65245824. Its totient is φ = 4992000.

The previous prime is 20975453. The next prime is 20975509. The reversal of 20975460 is 6457902.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40000 + ... + 40520.

It is an arithmetic number, because the mean of its divisors is an integer number (679644).

Almost surely, 2^20975460 is an apocalyptic number.

20975460 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 20975460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32622912).

20975460 is an abundant number, since it is smaller than the sum of its proper divisors (44270364).

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

20975460 is a wasteful number, since it uses less digits than its factorization.

20975460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20975460 is about 4579.8973787630. The cubic root of 20975460 is about 275.7849090846.

It can be divided in two parts, 2097 and 5460, that added together give a palindrome (7557).

The spelling of 20975460 in words is "twenty million, nine hundred seventy-five thousand, four hundred sixty".