18772120 has 16 divisors (see below), whose sum is σ = 42237360. Its totient is φ = 7508832.

The previous prime is 18772099. The next prime is 18772121. The reversal of 18772120 is 2127781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18772121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234612 + ... + 234691.

It is an arithmetic number, because the mean of its divisors is an integer number (2639835).

Almost surely, 2^18772120 is an apocalyptic number.

18772120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18772120 is an abundant number, since it is smaller than the sum of its proper divisors (23465240).

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

18772120 is a wasteful number, since it uses less digits than its factorization.

18772120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469314 (or 469310 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 18772120 is about 4332.6804636391. The cubic root of 18772120 is about 265.7690723845.

The spelling of 18772120 in words is "eighteen million, seven hundred seventy-two thousand, one hundred twenty".