20285196 has 12 divisors (see below), whose sum is σ = 47332152. Its totient is φ = 6761728.

The previous prime is 20285099. The next prime is 20285263. The reversal of 20285196 is 69158202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20285196² = 822978353516832, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

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 3 ways as a sum of consecutive naturals, for example, 845205 + ... + 845228.

It is an arithmetic number, because the mean of its divisors is an integer number (3944346).

Almost surely, 2^20285196 is an apocalyptic number.

It is an amenable number.

20285196 is an abundant number, since it is smaller than the sum of its proper divisors (27046956).

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

20285196 is a wasteful number, since it uses less digits than its factorization.

20285196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690440 (or 1690438 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 20285196 is about 4503.9089688847. The cubic root of 20285196 is about 272.7259120336.

The spelling of 20285196 in words is "twenty million, two hundred eighty-five thousand, one hundred ninety-six".