18877340 has 24 divisors (see below), whose sum is σ = 39871440. Its totient is φ = 7507328.

The previous prime is 18877337. The next prime is 18877373. The reversal of 18877340 is 4377881.

It is a junction number, because it is equal to n+sod(n) for n = 18877294 and 18877303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944 + ... + 6216.

It is an arithmetic number, because the mean of its divisors is an integer number (1661310).

Almost surely, 2^18877340 is an apocalyptic number.

18877340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18877340 is an abundant number, since it is smaller than the sum of its proper divisors (20994100).

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

18877340 is a wasteful number, since it uses less digits than its factorization.

18877340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5461 (or 5459 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 18877340 is about 4344.8060946376. The cubic root of 18877340 is about 266.2647034280.

The spelling of 18877340 in words is "eighteen million, eight hundred seventy-seven thousand, three hundred forty".