20845727 has 6 divisors (see below), whose sum is σ = 24249168. Its totient is φ = 17867724.

The previous prime is 20845711. The next prime is 20845771. The reversal of 20845727 is 72754802.

It is not a de Polignac number, because 20845727 - 2⁴ = 20845711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20845327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212663 + ... + 212760.

It is an arithmetic number, because the mean of its divisors is an integer number (4041528).

Almost surely, 2^20845727 is an apocalyptic number.

20845727 is a deficient number, since it is larger than the sum of its proper divisors (3403441).

20845727 is an equidigital number, since it uses as much as digits as its factorization.

20845727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425437 (or 425430 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 20845727 is about 4565.7121021808. The cubic root of 20845727 is about 275.2151572391.

The spelling of 20845727 in words is "twenty million, eight hundred forty-five thousand, seven hundred twenty-seven".