20460561 has 16 divisors (see below), whose sum is σ = 30455040. Its totient is φ = 12111120.

The previous prime is 20460553. The next prime is 20460569. The reversal of 20460561 is 16506402.

It is an interprime number because it is at equal distance from previous prime (20460553) and next prime (20460569).

It is not a de Polignac number, because 20460561 - 2³ = 20460553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20460569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5791 + ... + 8628.

It is an arithmetic number, because the mean of its divisors is an integer number (1903440).

Almost surely, 2^20460561 is an apocalyptic number.

It is an amenable number.

20460561 is a deficient number, since it is larger than the sum of its proper divisors (9994479).

20460561 is a wasteful number, since it uses less digits than its factorization.

20460561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14476.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20460561 is about 4523.3351633502. The cubic root of 20460561 is about 273.5095609869.

Adding to 20460561 its reverse (16506402), we get a palindrome (36966963).

The spelling of 20460561 in words is "twenty million, four hundred sixty thousand, five hundred sixty-one".