20418396 has 12 divisors (see below), whose sum is σ = 47642952. Its totient is φ = 6806128.

The previous prime is 20418379. The next prime is 20418401. The reversal of 20418396 is 69381402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850755 + ... + 850778.

It is an arithmetic number, because the mean of its divisors is an integer number (3970246).

Almost surely, 2^20418396 is an apocalyptic number.

It is an amenable number.

20418396 is an abundant number, since it is smaller than the sum of its proper divisors (27224556).

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

20418396 is a wasteful number, since it uses less digits than its factorization.

20418396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701540 (or 1701538 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20418396 is about 4518.6719287862. The cubic root of 20418396 is about 273.3215494953.

Adding to 20418396 its reverse (69381402), we get a palindrome (89799798).

The spelling of 20418396 in words is "twenty million, four hundred eighteen thousand, three hundred ninety-six".