20285586 has 32 divisors (see below), whose sum is σ = 47041920. Its totient is φ = 6467472.

The previous prime is 20285581. The next prime is 20285593. The reversal of 20285586 is 68558202.

It is a self number, because there is not a number n which added to its sum of digits gives 20285586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6925 + ... + 9408.

It is an arithmetic number, because the mean of its divisors is an integer number (1470060).

Almost surely, 2^20285586 is an apocalyptic number.

20285586 is an abundant number, since it is smaller than the sum of its proper divisors (26756334).

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

20285586 is a wasteful number, since it uses less digits than its factorization.

20285586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16367 (or 16361 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 20285586 is about 4503.9522644007. The cubic root of 20285586 is about 272.7276598176.

The spelling of 20285586 in words is "twenty million, two hundred eighty-five thousand, five hundred eighty-six".