18620966 has 32 divisors (see below), whose sum is σ = 34751808. Its totient is φ = 7286400.

The previous prime is 18620963. The next prime is 18620981. The reversal of 18620966 is 66902681.

18620966 = T₁₈₈ + T₁₈₉ + ... + T₄₉₀.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18620963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17876 + ... + 18888.

It is an arithmetic number, because the mean of its divisors is an integer number (1085994).

Almost surely, 2^18620966 is an apocalyptic number.

18620966 is a deficient number, since it is larger than the sum of its proper divisors (16130842).

18620966 is a wasteful number, since it uses less digits than its factorization.

18620966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 18620966 is about 4315.2017334071. The cubic root of 18620966 is about 265.0538207997.

The spelling of 18620966 in words is "eighteen million, six hundred twenty thousand, nine hundred sixty-six".