20207418 has 64 divisors (see below), whose sum is σ = 50872320. Its totient is φ = 5198400.

The previous prime is 20207417. The next prime is 20207419. The reversal of 20207418 is 81470202.

It is an interprime number because it is at equal distance from previous prime (20207417) and next prime (20207419).

It is not an unprimeable number, because it can be changed into a prime (20207417) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 88128 + ... + 88356.

It is an arithmetic number, because the mean of its divisors is an integer number (794880).

Almost surely, 2^20207418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20207418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25436160).

20207418 is an abundant number, since it is smaller than the sum of its proper divisors (30664902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20207418 is a wasteful number, since it uses less digits than its factorization.

20207418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 20207418 is about 4495.2661767686. The cubic root of 20207418 is about 272.3769014464.

The spelling of 20207418 in words is "twenty million, two hundred seven thousand, four hundred eighteen".