20918914 has 8 divisors (see below), whose sum is σ = 32742720. Its totient is φ = 10004676.

The previous prime is 20918851. The next prime is 20918917. The reversal of 20918914 is 41981902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20918914.

It is not an unprimeable number, because it can be changed into a prime (20918917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227334 + ... + 227425.

It is an arithmetic number, because the mean of its divisors is an integer number (4092840).

Almost surely, 2^20918914 is an apocalyptic number.

20918914 is a deficient number, since it is larger than the sum of its proper divisors (11823806).

20918914 is a wasteful number, since it uses less digits than its factorization.

20918914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454784.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 20918914 is about 4573.7199302100. The cubic root of 20918914 is about 275.5368641814.

The spelling of 20918914 in words is "twenty million, nine hundred eighteen thousand, nine hundred fourteen".