20418601 has 4 divisors (see below), whose sum is σ = 23335552. Its totient is φ = 17501652.

The previous prime is 20418583. The next prime is 20418613. The reversal of 20418601 is 10681402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20418601 - 2⁵ = 20418569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20418631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1458465 + ... + 1458478.

It is an arithmetic number, because the mean of its divisors is an integer number (5833888).

Almost surely, 2^20418601 is an apocalyptic number.

It is an amenable number.

20418601 is a deficient number, since it is larger than the sum of its proper divisors (2916951).

20418601 is an equidigital number, since it uses as much as digits as its factorization.

20418601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916950.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20418601 is about 4518.6946123853. The cubic root of 20418601 is about 273.3224642052.

The spelling of 20418601 in words is "twenty million, four hundred eighteen thousand, six hundred one".