20298816 has 112 divisors (see below), whose sum is σ = 63276480. Its totient is φ = 6359040.

The previous prime is 20298797. The next prime is 20298823. The reversal of 20298816 is 61889202.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29031 + ... + 29721.

Almost surely, 2^20298816 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 20298816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31638240).

20298816 is an abundant number, since it is smaller than the sum of its proper divisors (42977664).

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

20298816 is a wasteful number, since it uses less digits than its factorization.

20298816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 20298816 is about 4505.4207350701. The cubic root of 20298816 is about 272.7869367646.

The spelling of 20298816 in words is "twenty million, two hundred ninety-eight thousand, eight hundred sixteen".