20427786 has 12 divisors (see below), whose sum is σ = 44260242. Its totient is φ = 6809256.

The previous prime is 20427773. The next prime is 20427787. The reversal of 20427786 is 68772402.

It can be written as a sum of positive squares in only one way, i.e., 13505625 + 6922161 = 3675^2 + 2631^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20427786.

It is not an unprimeable number, because it can be changed into a prime (20427787) 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, 567421 + ... + 567456.

Almost surely, 2^20427786 is an apocalyptic number.

20427786 is an abundant number, since it is smaller than the sum of its proper divisors (23832456).

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

20427786 is a wasteful number, since it uses less digits than its factorization.

20427786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134885 (or 1134882 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 20427786 is about 4519.7108314581. The cubic root of 20427786 is about 273.3634413923.

The spelling of 20427786 in words is "twenty million, four hundred twenty-seven thousand, seven hundred eighty-six".