20485674 has 48 divisors (see below), whose sum is σ = 48803040. Its totient is φ = 6158880.

The previous prime is 20485669. The next prime is 20485693. The reversal of 20485674 is 47658402.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 30757 + ... + 31415.

It is an arithmetic number, because the mean of its divisors is an integer number (1016730).

Almost surely, 2^20485674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20485674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24401520).

20485674 is an abundant number, since it is smaller than the sum of its proper divisors (28317366).

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

20485674 is a wasteful number, since it uses less digits than its factorization.

20485674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 20485674 is about 4526.1102505352. The cubic root of 20485674 is about 273.6214158111.

The spelling of 20485674 in words is "twenty million, four hundred eighty-five thousand, six hundred seventy-four".