20779226 has 16 divisors (see below), whose sum is σ = 33772200. Its totient is φ = 9588384.

The previous prime is 20779193. The next prime is 20779247. The reversal of 20779226 is 62297702.

It can be written as a sum of positive squares in 4 ways, for example, as 303601 + 20475625 = 551^2 + 4525^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030 + ... + 6758.

Almost surely, 2^20779226 is an apocalyptic number.

20779226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20779226 is a deficient number, since it is larger than the sum of its proper divisors (12992974).

20779226 is an equidigital number, since it uses as much as digits as its factorization.

20779226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770 (or 4744 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20779226 is about 4558.4236310374. The cubic root of 20779226 is about 274.9221862484.

The spelling of 20779226 in words is "twenty million, seven hundred seventy-nine thousand, two hundred twenty-six".