20085480 has 48 divisors (see below), whose sum is σ = 65278980. Its totient is φ = 5356032.

The previous prime is 20085479. The next prime is 20085491. The reversal of 20085480 is 8458002.

It can be written as a sum of positive squares in 2 ways, for example, as 17994564 + 2090916 = 4242^2 + 1446^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27537 + ... + 28256.

Almost surely, 2^20085480 is an apocalyptic number.

20085480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20085480 is an abundant number, since it is smaller than the sum of its proper divisors (45193500).

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

20085480 is a wasteful number, since it uses less digits than its factorization.

20085480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55810 (or 55803 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 20085480 is about 4481.6827196936. The cubic root of 20085480 is about 271.8279260551.

The spelling of 20085480 in words is "twenty million, eighty-five thousand, four hundred eighty".