20398368 has 96 divisors (see below), whose sum is σ = 58786560. Its totient is φ = 6164480.

The previous prime is 20398333. The next prime is 20398387. The reversal of 20398368 is 86389302.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47113 + ... + 47543.

It is an arithmetic number, because the mean of its divisors is an integer number (612360).

Almost surely, 2^20398368 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 20398368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29393280).

20398368 is an abundant number, since it is smaller than the sum of its proper divisors (38388192).

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

20398368 is a wasteful number, since it uses less digits than its factorization.

20398368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 20398368 is about 4516.4552472044. The cubic root of 20398368 is about 273.2321550300.

The spelling of 20398368 in words is "twenty million, three hundred ninety-eight thousand, three hundred sixty-eight".