4020447650 has 12 divisors (see below), whose sum is σ = 7478032722. Its totient is φ = 1608179040.

The previous prime is 4020447637. The next prime is 4020447653. The reversal of 4020447650 is 567440204.

It is a Cunningham number, because it is equal to 63407²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 3705278641 + 315169009 = 60871^2 + 17753^2 .

It is not an unprimeable number, because it can be changed into a prime (4020447653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40204427 + ... + 40204526.

Almost surely, 2^4020447650 is an apocalyptic number.

4020447650 is a deficient number, since it is larger than the sum of its proper divisors (3457585072).

4020447650 is a wasteful number, since it uses less digits than its factorization.

4020447650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80408965 (or 80408960 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 4020447650 is about 63407.0000078856. Note that the first 5 decimals coincide. The cubic root of 4020447650 is about 1590.1013410613.

Adding to 4020447650 its reverse (567440204), we get a palindrome (4587887854).

The spelling of 4020447650 in words is "four billion, twenty million, four hundred forty-seven thousand, six hundred fifty".