20867776 has 42 divisors (see below), whose sum is σ = 43924220. Its totient is φ = 9809280.

The previous prime is 20867773. The next prime is 20867809. The reversal of 20867776 is 67776802.

It is not an unprimeable number, because it can be changed into a prime (20867773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159231 + ... + 159361.

Almost surely, 2^20867776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20867776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21962110).

20867776 is an abundant number, since it is smaller than the sum of its proper divisors (23056444).

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

20867776 is an equidigital number, since it uses as much as digits as its factorization.

20867776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 20867776 is about 4568.1260928306. The cubic root of 20867776 is about 275.3121568266.

The spelling of 20867776 in words is "twenty million, eight hundred sixty-seven thousand, seven hundred seventy-six".