20418670 has 8 divisors (see below), whose sum is σ = 36753624. Its totient is φ = 8167464.

The previous prime is 20418667. The next prime is 20418689. The reversal of 20418670 is 7681402.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1020924 + ... + 1020943.

It is an arithmetic number, because the mean of its divisors is an integer number (4594203).

Almost surely, 2^20418670 is an apocalyptic number.

20418670 is a deficient number, since it is larger than the sum of its proper divisors (16334954).

20418670 is a wasteful number, since it uses less digits than its factorization.

20418670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041874.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20418670 is about 4518.7022473272. The cubic root of 20418670 is about 273.3227720819.

The spelling of 20418670 in words is "twenty million, four hundred eighteen thousand, six hundred seventy".