20239800 has 192 divisors, whose sum is σ = 73804800. Its totient is φ = 4492800.

The previous prime is 20239787. The next prime is 20239811. The reversal of 20239800 is 893202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 256161 + ... + 256239.

It is an arithmetic number, because the mean of its divisors is an integer number (384400).

Almost surely, 2^20239800 is an apocalyptic number.

20239800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20239800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36902400).

20239800 is an abundant number, since it is smaller than the sum of its proper divisors (53565000).

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

20239800 is a wasteful number, since it uses less digits than its factorization.

20239800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20239800 is about 4498.8665239147. The cubic root of 20239800 is about 272.5223167201.

The spelling of 20239800 in words is "twenty million, two hundred thirty-nine thousand, eight hundred".