20772826 has 4 divisors (see below), whose sum is σ = 31159242. Its totient is φ = 10386412.

The previous prime is 20772811. The next prime is 20772847. The reversal of 20772826 is 62827702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14447601 + 6325225 = 3801^2 + 2515^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20772791 and 20772800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5193205 + ... + 5193208.

Almost surely, 2^20772826 is an apocalyptic number.

20772826 is a deficient number, since it is larger than the sum of its proper divisors (10386416).

20772826 is a wasteful number, since it uses less digits than its factorization.

20772826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10386415.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 20772826 is about 4557.7215799125. The cubic root of 20772826 is about 274.8939580128.

The spelling of 20772826 in words is "twenty million, seven hundred seventy-two thousand, eight hundred twenty-six".