20120860 has 96 divisors (see below), whose sum is σ = 48771072. Its totient is φ = 6927360.

The previous prime is 20120851. The next prime is 20120887. The reversal of 20120860 is 6802102.

20120860 = T₃₆₆₁ + T₃₆₆₂ + T₃₆₆₃.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242379 + ... + 242461.

It is an arithmetic number, because the mean of its divisors is an integer number (508032).

Almost surely, 2^20120860 is an apocalyptic number.

20120860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

20120860 is the 3663-rd centered triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24385536).

20120860 is an abundant number, since it is smaller than the sum of its proper divisors (28650212).

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

20120860 is a wasteful number, since it uses less digits than its factorization.

20120860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20120860 is about 4485.6281611386. The cubic root of 20120860 is about 271.9874381454.

Adding to 20120860 its reverse (6802102), we get a palindrome (26922962).

The spelling of 20120860 in words is "twenty million, one hundred twenty thousand, eight hundred sixty".