20196890 has 16 divisors (see below), whose sum is σ = 41548032. Its totient is φ = 6924624.

The previous prime is 20196889. The next prime is 20196893. The reversal of 20196890 is 9869102.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 20196890.

It is not an unprimeable number, because it can be changed into a prime (20196893) 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 7 ways as a sum of consecutive naturals, for example, 144194 + ... + 144333.

It is an arithmetic number, because the mean of its divisors is an integer number (2596752).

Almost surely, 2^20196890 is an apocalyptic number.

20196890 is an abundant number, since it is smaller than the sum of its proper divisors (21351142).

20196890 is a wasteful number, since it uses less digits than its factorization.

20196890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288541.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 20196890 is about 4494.0950145719. The cubic root of 20196890 is about 272.3295907317.

The spelling of 20196890 in words is "twenty million, one hundred ninety-six thousand, eight hundred ninety".