20186850 has 48 divisors (see below), whose sum is σ = 50934240. Its totient is φ = 5289600.

The previous prime is 20186843. The next prime is 20186857. The reversal of 20186850 is 5868102.

It is an interprime number because it is at equal distance from previous prime (20186843) and next prime (20186857).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (20186857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7710 + ... + 9990.

It is an arithmetic number, because the mean of its divisors is an integer number (1061130).

Almost surely, 2^20186850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20186850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25467120).

20186850 is an abundant number, since it is smaller than the sum of its proper divisors (30747390).

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

20186850 is a wasteful number, since it uses less digits than its factorization.

20186850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355 (or 2350 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 20186850 is about 4492.9778543857. The cubic root of 20186850 is about 272.2844576728.

The spelling of 20186850 in words is "twenty million, one hundred eighty-six thousand, eight hundred fifty".