20485893 has 16 divisors (see below), whose sum is σ = 28619136. Its totient is φ = 13009920.

The previous prime is 20485891. The next prime is 20485897. The reversal of 20485893 is 39858402.

It is a happy number.

It is not a de Polignac number, because 20485893 - 2¹ = 20485891 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20485891) 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 15 ways as a sum of consecutive naturals, for example, 22813 + ... + 23693.

It is an arithmetic number, because the mean of its divisors is an integer number (1788696).

Almost surely, 2^20485893 is an apocalyptic number.

20485893 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20485893 is a deficient number, since it is larger than the sum of its proper divisors (8133243).

20485893 is a wasteful number, since it uses less digits than its factorization.

20485893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 20485893 is about 4526.1344434296. The cubic root of 20485893 is about 273.6223908482.

The spelling of 20485893 in words is "twenty million, four hundred eighty-five thousand, eight hundred ninety-three".