20388118 has 8 divisors (see below), whose sum is σ = 30709800. Its totient is φ = 10151520.

The previous prime is 20388107. The next prime is 20388119. The reversal of 20388118 is 81188302.

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 20388118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20388119) 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, 20668 + ... + 21631.

It is an arithmetic number, because the mean of its divisors is an integer number (3838725).

Almost surely, 2^20388118 is an apocalyptic number.

20388118 is a deficient number, since it is larger than the sum of its proper divisors (10321682).

20388118 is a wasteful number, since it uses less digits than its factorization.

20388118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42542.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 20388118 is about 4515.3203651568. The cubic root of 20388118 is about 273.1863817796.

The spelling of 20388118 in words is "twenty million, three hundred eighty-eight thousand, one hundred eighteen".