120021918 has 16 divisors (see below), whose sum is σ = 240151440. Its totient is φ = 39989376.

The previous prime is 120021911. The next prime is 120021931. The reversal of 120021918 is 819120021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021911) 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, 22668 + ... + 27456.

It is an arithmetic number, because the mean of its divisors is an integer number (15009465).

Almost surely, 2^120021918 is an apocalyptic number.

120021918 is an abundant number, since it is smaller than the sum of its proper divisors (120129522).

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

120021918 is a wasteful number, since it uses less digits than its factorization.

120021918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8971.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 120021918 is about 10955.4515196773. The cubic root of 120021918 is about 493.2724432803.

Adding to 120021918 its reverse (819120021), we get a palindrome (939141939).

The spelling of 120021918 in words is "one hundred twenty million, twenty-one thousand, nine hundred eighteen".