20229750 has 128 divisors (see below), whose sum is σ = 58331520. Its totient is φ = 5248800.

The previous prime is 20229731. The next prime is 20229757. The reversal of 20229750 is 5792202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20229757) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 546732 + ... + 546768.

It is an arithmetic number, because the mean of its divisors is an integer number (455715).

Almost surely, 2^20229750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20229750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29165760).

20229750 is an abundant number, since it is smaller than the sum of its proper divisors (38101770).

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

20229750 is an frugal number, since it uses more digits than its factorization.

20229750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20229750 is about 4497.7494372186. The cubic root of 20229750 is about 272.4772025930.

The spelling of 20229750 in words is "twenty million, two hundred twenty-nine thousand, seven hundred fifty".