20916318 has 16 divisors (see below), whose sum is σ = 42806016. Its totient is φ = 6809880.

The previous prime is 20916317. The next prime is 20916331. The reversal of 20916318 is 81361902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20916317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40278 + ... + 40793.

It is an arithmetic number, because the mean of its divisors is an integer number (2675376).

Almost surely, 2^20916318 is an apocalyptic number.

20916318 is an abundant number, since it is smaller than the sum of its proper divisors (21889698).

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

20916318 is a wasteful number, since it uses less digits than its factorization.

20916318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81119.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 20916318 is about 4573.4361261529. The cubic root of 20916318 is about 275.5254658318.

The spelling of 20916318 in words is "twenty million, nine hundred sixteen thousand, three hundred eighteen".