17972118 has 20 divisors (see below), whose sum is σ = 40271220. Its totient is φ = 5990652.

The previous prime is 17972117. The next prime is 17972153. The reversal of 17972118 is 81127971.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17972117) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55308 + ... + 55631.

It is an arithmetic number, because the mean of its divisors is an integer number (2013561).

Almost surely, 2^17972118 is an apocalyptic number.

17972118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

17972118 is an abundant number, since it is smaller than the sum of its proper divisors (22299102).

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

17972118 is a wasteful number, since it uses less digits than its factorization.

17972118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110953 (or 110944 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 17972118 is about 4239.3534884461. The cubic root of 17972118 is about 261.9387518777.

The spelling of 17972118 in words is "seventeen million, nine hundred seventy-two thousand, one hundred eighteen".