20285574 has 8 divisors (see below), whose sum is σ = 40571160. Its totient is φ = 6761856.

The previous prime is 20285567. The next prime is 20285579. The reversal of 20285574 is 47558202.

Added to its reverse (47558202) it gives a triangular number (67843776 = T₁₁₆₄₈).

It is a sphenic number, since it is the product of 3 distinct primes.

20285574 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1690459 + ... + 1690470.

It is an arithmetic number, because the mean of its divisors is an integer number (5071395).

Almost surely, 2^20285574 is an apocalyptic number.

20285574 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20285574 is a wasteful number, since it uses less digits than its factorization.

20285574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380934.

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

The square root of 20285574 is about 4503.9509322372. The cubic root of 20285574 is about 272.7276060400.

Adding to 20285574 its reverse (47558202), we get a triangular number (67843776 = T₁₁₆₄₈).

The spelling of 20285574 in words is "twenty million, two hundred eighty-five thousand, five hundred seventy-four".