20061860 has 96 divisors (see below), whose sum is σ = 52910592. Its totient is φ = 6220800.

The previous prime is 20061857. The next prime is 20061871. The reversal of 20061860 is 6816002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132785 + ... + 132935.

It is an arithmetic number, because the mean of its divisors is an integer number (551152).

Almost surely, 2^20061860 is an apocalyptic number.

20061860 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 20061860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26455296).

20061860 is an abundant number, since it is smaller than the sum of its proper divisors (32848732).

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

20061860 is a wasteful number, since it uses less digits than its factorization.

20061860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20061860 is about 4479.0467735892. The cubic root of 20061860 is about 271.7213300785.

Adding to 20061860 its reverse (6816002), we get a palindrome (26877862).

The spelling of 20061860 in words is "twenty million, sixty-one thousand, eight hundred sixty".