18261875 has 20 divisors (see below), whose sum is σ = 23242560. Its totient is φ = 14340000.

The previous prime is 18261871. The next prime is 18261889. The reversal of 18261875 is 57816281.

It is not a de Polignac number, because 18261875 - 2² = 18261871 is a prime.

Its product of digits (26880) is a multiple of the sum of its prime factors (560).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18261871) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37886 + ... + 38364.

It is an arithmetic number, because the mean of its divisors is an integer number (1162128).

Almost surely, 2^18261875 is an apocalyptic number.

18261875 is a deficient number, since it is larger than the sum of its proper divisors (4980685).

18261875 is an frugal number, since it uses more digits than its factorization.

18261875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 545 counting only the distinct ones).

The product of its digits is 26880, while the sum is 38.

The square root of 18261875 is about 4273.3915102644. The cubic root of 18261875 is about 263.3389635429.

The spelling of 18261875 in words is "eighteen million, two hundred sixty-one thousand, eight hundred seventy-five".