20485516 has 6 divisors (see below), whose sum is σ = 35849660. Its totient is φ = 10242756.

The previous prime is 20485511. The next prime is 20485519. The reversal of 20485516 is 61558402.

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 as a sum of consecutive naturals, namely, 2560686 + ... + 2560693.

Almost surely, 2^20485516 is an apocalyptic number.

It is an amenable number.

20485516 is a deficient number, since it is larger than the sum of its proper divisors (15364144).

20485516 is a wasteful number, since it uses less digits than its factorization.

20485516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5121383 (or 5121381 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 20485516 is about 4526.0927962206. The cubic root of 20485516 is about 273.6207123553.

The spelling of 20485516 in words is "twenty million, four hundred eighty-five thousand, five hundred sixteen".