20776436 has 6 divisors (see below), whose sum is σ = 36358770. Its totient is φ = 10388216.

The previous prime is 20776433. The next prime is 20776451. The reversal of 20776436 is 63467702.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 164836 = 4540^2 + 406^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20776396 and 20776405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20776433) 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, 2597051 + ... + 2597058.

It is an arithmetic number, because the mean of its divisors is an integer number (6059795).

Almost surely, 2^20776436 is an apocalyptic number.

It is an amenable number.

20776436 is a deficient number, since it is larger than the sum of its proper divisors (15582334).

20776436 is a wasteful number, since it uses less digits than its factorization.

20776436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5194113 (or 5194111 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 20776436 is about 4558.1175939197. The cubic root of 20776436 is about 274.9098812147.

It can be divided in two parts, 20776 and 436, that added together give a palindrome (21212).

The spelling of 20776436 in words is "twenty million, seven hundred seventy-six thousand, four hundred thirty-six".