20156850 has 168 divisors, whose sum is σ = 65055360. Its totient is φ = 4548960.

The previous prime is 20156837. The next prime is 20156861. The reversal of 20156850 is 5865102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 255111 + ... + 255189.

Almost surely, 2^20156850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20156850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32527680).

20156850 is an abundant number, since it is smaller than the sum of its proper divisors (44898510).

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

20156850 is an equidigital number, since it uses as much as digits as its factorization.

20156850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 20156850 is about 4489.6380700453. The cubic root of 20156850 is about 272.1495087079.

The spelling of 20156850 in words is "twenty million, one hundred fifty-six thousand, eight hundred fifty".