20485277 has 2 divisors, whose sum is σ = 20485278. Its totient is φ = 20485276.

The previous prime is 20485271. The next prime is 20485301. The reversal of 20485277 is 77258402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 9369721 = 3334^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 20485277 - 2⁴ = 20485261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20485271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10242638 + 10242639.

It is an arithmetic number, because the mean of its divisors is an integer number (10242639).

Almost surely, 2^20485277 is an apocalyptic number.

It is an amenable number.

20485277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20485277 is an equidigital number, since it uses as much as digits as its factorization.

20485277 is an evil number, because the sum of its binary digits is even.

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

The square root of 20485277 is about 4526.0663936801. The cubic root of 20485277 is about 273.6196482604.

The spelling of 20485277 in words is "twenty million, four hundred eighty-five thousand, two hundred seventy-seven".