20034820 has 48 divisors (see below), whose sum is σ = 45638208. Its totient is φ = 7344000.

The previous prime is 20034811. The next prime is 20034841. The reversal of 20034820 is 2843002.

It is a happy number.

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, 65107 + ... + 65413.

It is an arithmetic number, because the mean of its divisors is an integer number (950796).

Almost surely, 2^20034820 is an apocalyptic number.

20034820 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 20034820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22819104).

20034820 is an abundant number, since it is smaller than the sum of its proper divisors (25603388).

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

20034820 is a wasteful number, since it uses less digits than its factorization.

20034820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20034820 is about 4476.0272563960. The cubic root of 20034820 is about 271.5991970322.

Adding to 20034820 its reverse (2843002), we get a palindrome (22877822).

The spelling of 20034820 in words is "twenty million, thirty-four thousand, eight hundred twenty".