18875380 has 12 divisors (see below), whose sum is σ = 39638340. Its totient is φ = 7550144.

The previous prime is 18875377. The next prime is 18875393. The reversal of 18875380 is 8357881.

It can be written as a sum of positive squares in 2 ways, for example, as 13220496 + 5654884 = 3636^2 + 2378^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471865 + ... + 471904.

It is an arithmetic number, because the mean of its divisors is an integer number (3303195).

Almost surely, 2^18875380 is an apocalyptic number.

18875380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18875380 is an abundant number, since it is smaller than the sum of its proper divisors (20762960).

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

18875380 is a wasteful number, since it uses less digits than its factorization.

18875380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943778 (or 943776 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 18875380 is about 4344.5805321112. The cubic root of 18875380 is about 266.2554878486.

The spelling of 18875380 in words is "eighteen million, eight hundred seventy-five thousand, three hundred eighty".