20840060 has 24 divisors (see below), whose sum is σ = 45177216. Its totient is φ = 8066880.

The previous prime is 20840059. The next prime is 20840063. The reversal of 20840060 is 6004802.

20840060 = T₁₁₄₄ + T₁₁₄₅ + ... + T₁₁₇₄.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20840063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16187 + ... + 17426.

It is an arithmetic number, because the mean of its divisors is an integer number (1882384).

Almost surely, 2^20840060 is an apocalyptic number.

20840060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20840060 is an abundant number, since it is smaller than the sum of its proper divisors (24337156).

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

20840060 is a wasteful number, since it uses less digits than its factorization.

20840060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33653 (or 33651 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20840060 is about 4565.0914558199. The cubic root of 20840060 is about 275.1902155064.

Adding to 20840060 its reverse (6004802), we get a palindrome (26844862).

The spelling of 20840060 in words is "twenty million, eight hundred forty thousand, sixty".