20386674 has 64 divisors (see below), whose sum is σ = 56494080. Its totient is φ = 5294160.

The previous prime is 20386657. The next prime is 20386679. The reversal of 20386674 is 47668302.

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

It is not an unprimeable number, because it can be changed into a prime (20386679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1707 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (882720).

Almost surely, 2^20386674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20386674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28247040).

20386674 is an abundant number, since it is smaller than the sum of its proper divisors (36107406).

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

20386674 is a wasteful number, since it uses less digits than its factorization.

20386674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932 (or 4926 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 20386674 is about 4515.1604622649. The cubic root of 20386674 is about 273.1799321007.

The spelling of 20386674 in words is "twenty million, three hundred eighty-six thousand, six hundred seventy-four".