20649027 has 16 divisors (see below), whose sum is σ = 32136192. Its totient is φ = 11547840.

The previous prime is 20649019. The next prime is 20649037. The reversal of 20649027 is 72094602.

It is a happy number.

It is not a de Polignac number, because 20649027 - 2³ = 20649019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20648985 and 20649003.

It is not an unprimeable number, because it can be changed into a prime (20649037) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9474 + ... + 11447.

It is an arithmetic number, because the mean of its divisors is an integer number (2008512).

Almost surely, 2^20649027 is an apocalyptic number.

20649027 is a deficient number, since it is larger than the sum of its proper divisors (11487165).

20649027 is a wasteful number, since it uses less digits than its factorization.

20649027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20978.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20649027 is about 4544.1200468297. The cubic root of 20649027 is about 274.3467779704.

The spelling of 20649027 in words is "twenty million, six hundred forty-nine thousand, twenty-seven".