20234940 has 192 divisors, whose sum is σ = 68124672. Its totient is φ = 4435200.

The previous prime is 20234933. The next prime is 20234941. The reversal of 20234940 is 4943202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20234940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20234941) 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, 470559 + ... + 470601.

It is an arithmetic number, because the mean of its divisors is an integer number (354816).

Almost surely, 2^20234940 is an apocalyptic number.

20234940 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 20234940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34062336).

20234940 is an abundant number, since it is smaller than the sum of its proper divisors (47889732).

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

20234940 is a wasteful number, since it uses less digits than its factorization.

20234940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20234940 is about 4498.3263554349. The cubic root of 20234940 is about 272.5005022015.

The spelling of 20234940 in words is "twenty million, two hundred thirty-four thousand, nine hundred forty".