20485700 has 18 divisors (see below), whose sum is σ = 44454186. Its totient is φ = 8194240.

The previous prime is 20485693. The next prime is 20485711. The reversal of 20485700 is 758402.

It can be written as a sum of positive squares in 3 ways, for example, as 1024 + 20484676 = 32^2 + 4526^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20485700.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102329 + ... + 102528.

It is an arithmetic number, because the mean of its divisors is an integer number (2469677).

Almost surely, 2^20485700 is an apocalyptic number.

20485700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20485700 is an abundant number, since it is smaller than the sum of its proper divisors (23968486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20485700 is a wasteful number, since it uses less digits than its factorization.

20485700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204871 (or 204864 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20485700 is about 4526.1131227578. The cubic root of 20485700 is about 273.6215315693.

The spelling of 20485700 in words is "twenty million, four hundred eighty-five thousand, seven hundred".