20485510 has 16 divisors (see below), whose sum is σ = 39043296. Its totient is φ = 7712128.

The previous prime is 20485499. The next prime is 20485511. The reversal of 20485510 is 1558402.

It is a super-2 number, since 2×20485510² = 839312239920200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20485511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60082 + ... + 60421.

It is an arithmetic number, because the mean of its divisors is an integer number (2440206).

Almost surely, 2^20485510 is an apocalyptic number.

20485510 is a deficient number, since it is larger than the sum of its proper divisors (18557786).

20485510 is a wasteful number, since it uses less digits than its factorization.

20485510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120527.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 20485510 is about 4526.0921333972. The cubic root of 20485510 is about 273.6206856418.

The spelling of 20485510 in words is "twenty million, four hundred eighty-five thousand, five hundred ten".