20285475 has 24 divisors (see below), whose sum is σ = 38330880. Its totient is φ = 9273120.

The previous prime is 20285467. The next prime is 20285477. The reversal of 20285475 is 57458202.

It is not a de Polignac number, because 20285475 - 2³ = 20285467 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18795 + ... + 19844.

It is an arithmetic number, because the mean of its divisors is an integer number (1597120).

Almost surely, 2^20285475 is an apocalyptic number.

20285475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20285475 is a deficient number, since it is larger than the sum of its proper divisors (18045405).

20285475 is a wasteful number, since it uses less digits than its factorization.

20285475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38659 (or 38654 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 20285475 is about 4503.9399418731. The cubic root of 20285475 is about 272.7271623737.

It can be divided in two parts, 2028 and 5475, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 20285475 in words is "twenty million, two hundred eighty-five thousand, four hundred seventy-five".