20404060 has 48 divisors (see below), whose sum is σ = 44452800. Its totient is φ = 7861760.

The previous prime is 20404049. The next prime is 20404093. The reversal of 20404060 is 6040402.

It is a congruent 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, 122097 + ... + 122263.

It is an arithmetic number, because the mean of its divisors is an integer number (926100).

Almost surely, 2^20404060 is an apocalyptic number.

20404060 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 20404060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22226400).

20404060 is an abundant number, since it is smaller than the sum of its proper divisors (24048740).

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

20404060 is a wasteful number, since it uses less digits than its factorization.

20404060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20404060 is about 4517.0853434488. The cubic root of 20404060 is about 273.2575670759.

Adding to 20404060 its reverse (6040402), we get a palindrome (26444462).

The spelling of 20404060 in words is "twenty million, four hundred four thousand, sixty".