20297118 has 32 divisors (see below), whose sum is σ = 41893632. Its totient is φ = 6552000.

The previous prime is 20297041. The next prime is 20297131. The reversal of 20297118 is 81179202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38698 + ... + 39218.

It is an arithmetic number, because the mean of its divisors is an integer number (1309176).

Almost surely, 2^20297118 is an apocalyptic number.

20297118 is an abundant number, since it is smaller than the sum of its proper divisors (21596514).

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

20297118 is a wasteful number, since it uses less digits than its factorization.

20297118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 20297118 is about 4505.2322914585. The cubic root of 20297118 is about 272.7793303254.

The spelling of 20297118 in words is "twenty million, two hundred ninety-seven thousand, one hundred eighteen".