20481065 has 24 divisors (see below), whose sum is σ = 27371400. Its totient is φ = 14699520.

The previous prime is 20481059. The next prime is 20481067. The reversal of 20481065 is 56018402.

It can be written as a sum of positive squares in 4 ways, for example, as 3374569 + 17106496 = 1837^2 + 4136^2 .

It is not a de Polignac number, because 20481065 - 2⁸ = 20480809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20481067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58511 + ... + 58859.

It is an arithmetic number, because the mean of its divisors is an integer number (1140475).

Almost surely, 2^20481065 is an apocalyptic number.

It is an amenable number.

20481065 is a deficient number, since it is larger than the sum of its proper divisors (6890335).

20481065 is a wasteful number, since it uses less digits than its factorization.

20481065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20481065 is about 4525.6010650520. The cubic root of 20481065 is about 273.6008938975.

Adding to 20481065 its reverse (56018402), we get a palindrome (76499467).

It can be divided in two parts, 2048 and 1065, that added together give a palindrome (3113).

The spelling of 20481065 in words is "twenty million, four hundred eighty-one thousand, sixty-five".