20198464 has 56 divisors (see below), whose sum is σ = 47109888. Its totient is φ = 8471040.

The previous prime is 20198449. The next prime is 20198489. The reversal of 20198464 is 46489102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8049 + ... + 10255.

It is an arithmetic number, because the mean of its divisors is an integer number (841248).

Almost surely, 2^20198464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20198464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23554944).

20198464 is an abundant number, since it is smaller than the sum of its proper divisors (26911424).

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

20198464 is a wasteful number, since it uses less digits than its factorization.

20198464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243 (or 2233 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20198464 is about 4494.2701298431. The cubic root of 20198464 is about 272.3366650162.

The spelling of 20198464 in words is "twenty million, one hundred ninety-eight thousand, four hundred sixty-four".