20945027 has 4 divisors (see below), whose sum is σ = 21036720. Its totient is φ = 20853336.

The previous prime is 20944981. The next prime is 20945039. The reversal of 20945027 is 72054902.

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

It is a cyclic number.

It is not a de Polignac number, because 20945027 - 2⁸ = 20944771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20945227) 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 in 3 ways as a sum of consecutive naturals, for example, 45503 + ... + 45960.

It is an arithmetic number, because the mean of its divisors is an integer number (5259180).

Almost surely, 2^20945027 is an apocalyptic number.

20945027 is a deficient number, since it is larger than the sum of its proper divisors (91693).

20945027 is an equidigital number, since it uses as much as digits as its factorization.

20945027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91692.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20945027 is about 4576.5737184055. The cubic root of 20945027 is about 275.6514670450.

Adding to 20945027 its reverse (72054902), we get a palindrome (92999929).

The spelling of 20945027 in words is "twenty million, nine hundred forty-five thousand, twenty-seven".