20545485 has 32 divisors (see below), whose sum is σ = 34525440. Its totient is φ = 10418688.

The previous prime is 20545477. The next prime is 20545487. The reversal of 20545485 is 58454502.

It is not a de Polignac number, because 20545485 - 2³ = 20545477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31432 + ... + 32078.

It is an arithmetic number, because the mean of its divisors is an integer number (1078920).

Almost surely, 2^20545485 is an apocalyptic number.

It is an amenable number.

20545485 is a deficient number, since it is larger than the sum of its proper divisors (13979955).

20545485 is a wasteful number, since it uses less digits than its factorization.

20545485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757.

The product of its (nonzero) digits is 32000, while the sum is 33.

The square root of 20545485 is about 4532.7127638976. The cubic root of 20545485 is about 273.8874500006.

Adding to 20545485 its reverse (58454502), we get a palindrome (78999987).

The spelling of 20545485 in words is "twenty million, five hundred forty-five thousand, four hundred eighty-five".