20016860 has 24 divisors (see below), whose sum is σ = 42230160. Its totient is φ = 7969664.

The previous prime is 20016847. The next prime is 20016883. The reversal of 20016860 is 6861002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336 + ... + 6744.

It is an arithmetic number, because the mean of its divisors is an integer number (1759590).

Almost surely, 2^20016860 is an apocalyptic number.

20016860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20016860 is an abundant number, since it is smaller than the sum of its proper divisors (22213300).

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

20016860 is a wasteful number, since it uses less digits than its factorization.

20016860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645 (or 4643 counting only the distinct ones).

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

The square root of 20016860 is about 4474.0205632071. The cubic root of 20016860 is about 271.5180153712.

Adding to 20016860 its reverse (6861002), we get a palindrome (26877862).

The spelling of 20016860 in words is "twenty million, sixteen thousand, eight hundred sixty".