20418398 has 96 divisors (see below), whose sum is σ = 44126208. Its totient is φ = 6955200.

The previous prime is 20418379. The next prime is 20418401. The reversal of 20418398 is 89381402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 434411 + ... + 434457.

It is an arithmetic number, because the mean of its divisors is an integer number (459648).

Almost surely, 2^20418398 is an apocalyptic number.

20418398 is an abundant number, since it is smaller than the sum of its proper divisors (23707810).

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

20418398 is a wasteful number, since it uses less digits than its factorization.

20418398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20418398 is about 4518.6721500901. The cubic root of 20418398 is about 273.3215584193.

The spelling of 20418398 in words is "twenty million, four hundred eighteen thousand, three hundred ninety-eight".