18774120 has 64 divisors (see below), whose sum is σ = 59641920. Its totient is φ = 4711424.

The previous prime is 18774097. The next prime is 18774121. The reversal of 18774120 is 2147781.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (18774121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2562 + ... + 6641.

It is an arithmetic number, because the mean of its divisors is an integer number (931905).

Almost surely, 2^18774120 is an apocalyptic number.

18774120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18774120 is an abundant number, since it is smaller than the sum of its proper divisors (40867800).

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

18774120 is a wasteful number, since it uses less digits than its factorization.

18774120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9234 (or 9230 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 18774120 is about 4332.9112614961. The cubic root of 18774120 is about 265.7785104815.

The spelling of 18774120 in words is "eighteen million, seven hundred seventy-four thousand, one hundred twenty".