18406995 has 8 divisors (see below), whose sum is σ = 29451216. Its totient is φ = 9817056.

The previous prime is 18406987. The next prime is 18407003. The reversal of 18406995 is 59960481.

It is an interprime number because it is at equal distance from previous prime (18406987) and next prime (18407003).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18406995 - 2³ = 18406987 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613552 + ... + 613581.

It is an arithmetic number, because the mean of its divisors is an integer number (3681402).

Almost surely, 2^18406995 is an apocalyptic number.

18406995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18406995 is a deficient number, since it is larger than the sum of its proper divisors (11044221).

18406995 is a wasteful number, since it uses less digits than its factorization.

18406995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227141.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 18406995 is about 4290.3373993195. The cubic root of 18406995 is about 264.0346746237.

The spelling of 18406995 in words is "eighteen million, four hundred six thousand, nine hundred ninety-five".