20206860 has 48 divisors (see below), whose sum is σ = 57517152. Its totient is φ = 5299200.

The previous prime is 20206853. The next prime is 20206867. The reversal of 20206860 is 6860202.

It is an interprime number because it is at equal distance from previous prime (20206853) and next prime (20206867).

It is a self number, because there is not a number n which added to its sum of digits gives 20206860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20206867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 900 + ... + 6420.

It is an arithmetic number, because the mean of its divisors is an integer number (1198274).

Almost surely, 2^20206860 is an apocalyptic number.

20206860 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 20206860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28758576).

20206860 is an abundant number, since it is smaller than the sum of its proper divisors (37310292).

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

20206860 is a wasteful number, since it uses less digits than its factorization.

20206860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5594 (or 5592 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20206860 is about 4495.2041110499. The cubic root of 20206860 is about 272.3743943190.

The spelling of 20206860 in words is "twenty million, two hundred six thousand, eight hundred sixty".