20296140 has 24 divisors (see below), whose sum is σ = 56829360. Its totient is φ = 5412288.

The previous prime is 20296121. The next prime is 20296141. The reversal of 20296140 is 4169202.

It is a self number, because there is not a number n which added to its sum of digits gives 20296140.

It is not an unprimeable number, because it can be changed into a prime (20296141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169075 + ... + 169194.

It is an arithmetic number, because the mean of its divisors is an integer number (2367890).

Almost surely, 2^20296140 is an apocalyptic number.

20296140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20296140 is an abundant number, since it is smaller than the sum of its proper divisors (36533220).

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

20296140 is a wasteful number, since it uses less digits than its factorization.

20296140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338281 (or 338279 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20296140 is about 4505.1237496877. The cubic root of 20296140 is about 272.7749490388.

The spelling of 20296140 in words is "twenty million, two hundred ninety-six thousand, one hundred forty".