20236774 has 4 divisors (see below), whose sum is σ = 30355164. Its totient is φ = 10118386.

The previous prime is 20236771. The next prime is 20236781. The reversal of 20236774 is 47763202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47763202 = 2 ⋅23881601.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20236771) 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 as a sum of consecutive naturals, namely, 5059192 + ... + 5059195.

It is an arithmetic number, because the mean of its divisors is an integer number (7588791).

Almost surely, 2^20236774 is an apocalyptic number.

20236774 is a deficient number, since it is larger than the sum of its proper divisors (10118390).

20236774 is a wasteful number, since it uses less digits than its factorization.

20236774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10118389.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20236774 is about 4498.5302044112. The cubic root of 20236774 is about 272.5087346750.

Adding to 20236774 its reverse (47763202), we get a palindrome (67999976).

The spelling of 20236774 in words is "twenty million, two hundred thirty-six thousand, seven hundred seventy-four".