18677340 has 72 divisors (see below), whose sum is σ = 61811568. Its totient is φ = 4527360.

The previous prime is 18677327. The next prime is 18677353. The reversal of 18677340 is 4377681.

It is an interprime number because it is at equal distance from previous prime (18677327) and next prime (18677353).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 18677295 and 18677304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2737 + ... + 6696.

It is an arithmetic number, because the mean of its divisors is an integer number (858494).

Almost surely, 2^18677340 is an apocalyptic number.

18677340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18677340 is an abundant number, since it is smaller than the sum of its proper divisors (43134228).

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

18677340 is a wasteful number, since it uses less digits than its factorization.

18677340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9459 (or 9454 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 18677340 is about 4321.7288207383. The cubic root of 18677340 is about 265.3210301835.

18677340 divided by its sum of digits (36) gives a palindrome (518815).

The spelling of 18677340 in words is "eighteen million, six hundred seventy-seven thousand, three hundred forty".