18687074 has 16 divisors (see below), whose sum is σ = 32272128. Its totient is φ = 7949472.

The previous prime is 18687061. The next prime is 18687083. The reversal of 18687074 is 47078681.

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, 2954 + ... + 6789.

It is an arithmetic number, because the mean of its divisors is an integer number (2017008).

Almost surely, 2^18687074 is an apocalyptic number.

18687074 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18687074 is a deficient number, since it is larger than the sum of its proper divisors (13585054).

18687074 is a wasteful number, since it uses less digits than its factorization.

18687074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9889.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 18687074 is about 4322.8548437346. The cubic root of 18687074 is about 265.3671143043.

The spelling of 18687074 in words is "eighteen million, six hundred eighty-seven thousand, seventy-four".