20196140 has 12 divisors (see below), whose sum is σ = 42411936. Its totient is φ = 8078448.

The previous prime is 20196109. The next prime is 20196173. The reversal of 20196140 is 4169102.

It is a happy number.

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, 504884 + ... + 504923.

It is an arithmetic number, because the mean of its divisors is an integer number (3534328).

Almost surely, 2^20196140 is an apocalyptic number.

20196140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20196140 is an abundant number, since it is smaller than the sum of its proper divisors (22215796).

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

20196140 is a wasteful number, since it uses less digits than its factorization.

20196140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009816 (or 1009814 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20196140 is about 4494.0115709686. The cubic root of 20196140 is about 272.3262197552.

The spelling of 20196140 in words is "twenty million, one hundred ninety-six thousand, one hundred forty".