18626842 has 12 divisors (see below), whose sum is σ = 30255390. Its totient is φ = 8596848.

The previous prime is 18626837. The next prime is 18626879. The reversal of 18626842 is 24862681.

It can be written as a sum of positive squares in 3 ways, for example, as 12823561 + 5803281 = 3581^2 + 2409^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27217 + ... + 27892.

Almost surely, 2^18626842 is an apocalyptic number.

18626842 is a deficient number, since it is larger than the sum of its proper divisors (11628548).

18626842 is a wasteful number, since it uses less digits than its factorization.

18626842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55137 (or 55124 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 18626842 is about 4315.8825285218. The cubic root of 18626842 is about 265.0816978436.

It can be divided in two parts, 186 and 26842, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 18626842 in words is "eighteen million, six hundred twenty-six thousand, eight hundred forty-two".