20295228649 has 2 divisors, whose sum is σ = 20295228650. Its totient is φ = 20295228648.

The previous prime is 20295228637. The next prime is 20295228713. The reversal of 20295228649 is 94682259202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16446267049 + 3848961600 = 128243^2 + 62040^2 .

It is a cyclic number.

It is not a de Polignac number, because 20295228649 - 2²¹ = 20293131497 is a prime.

It is not a weakly prime, because it can be changed into another prime (20295229649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10147614324 + 10147614325.

It is an arithmetic number, because the mean of its divisors is an integer number (10147614325).

Almost surely, 2^20295228649 is an apocalyptic number.

It is an amenable number.

20295228649 is a deficient number, since it is larger than the sum of its proper divisors (1).

20295228649 is an equidigital number, since it uses as much as digits as its factorization.

20295228649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 20295228649 in words is "twenty billion, two hundred ninety-five million, two hundred twenty-eight thousand, six hundred forty-nine".