18709416 has 48 divisors (see below), whose sum is σ = 55280160. Its totient is φ = 5669280.

The previous prime is 18709393. The next prime is 18709417. The reversal of 18709416 is 61490781.

It is a super-2 number, since 2×18709416² = 700084494122112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18709417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11020 + ... + 12603.

It is an arithmetic number, because the mean of its divisors is an integer number (1151670).

Almost surely, 2^18709416 is an apocalyptic number.

It is an amenable number.

18709416 is an abundant number, since it is smaller than the sum of its proper divisors (36570744).

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

18709416 is a wasteful number, since it uses less digits than its factorization.

18709416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23646 (or 23639 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18709416 is about 4325.4382436928. The cubic root of 18709416 is about 265.4728285684.

The spelling of 18709416 in words is "eighteen million, seven hundred nine thousand, four hundred sixteen".