20727122 has 16 divisors (see below), whose sum is σ = 33613272. Its totient is φ = 9528960.

The previous prime is 20727103. The next prime is 20727137. The reversal of 20727122 is 22172702.

It can be written as a sum of positive squares in 4 ways, for example, as 10106041 + 10621081 = 3179^2 + 3259^2 .

It is a super-2 number, since 2×20727122² = 859227172805768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5888 + ... + 8724.

Almost surely, 2^20727122 is an apocalyptic number.

20727122 is a deficient number, since it is larger than the sum of its proper divisors (12886150).

20727122 is a wasteful number, since it uses less digits than its factorization.

20727122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20727122 is about 4552.7049102704. The cubic root of 20727122 is about 274.6922043865.

Adding to 20727122 its reverse (22172702), we get a palindrome (42899824).

The spelling of 20727122 in words is "twenty million, seven hundred twenty-seven thousand, one hundred twenty-two".