20488849 has 2 divisors, whose sum is σ = 20488850. Its totient is φ = 20488848.

The previous prime is 20488847. The next prime is 20488891. The reversal of 20488849 is 94888402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16548624 + 3940225 = 4068^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 20488849 - 2¹ = 20488847 is a prime.

Together with 20488847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20488843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244424 + 10244425.

It is an arithmetic number, because the mean of its divisors is an integer number (10244425).

Almost surely, 2^20488849 is an apocalyptic number.

It is an amenable number.

20488849 is a deficient number, since it is larger than the sum of its proper divisors (1).

20488849 is an equidigital number, since it uses as much as digits as its factorization.

20488849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 20488849 is about 4526.4609796175. The cubic root of 20488849 is about 273.6355509431.

The spelling of 20488849 in words is "twenty million, four hundred eighty-eight thousand, eight hundred forty-nine".