20007650 has 24 divisors (see below), whose sum is σ = 40078164. Its totient is φ = 7387200.

The previous prime is 20007643. The next prime is 20007661. The reversal of 20007650 is 5670002.

It can be written as a sum of positive squares in 6 ways, for example, as 1697809 + 18309841 = 1303^2 + 4279^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14741 + ... + 16040.

Almost surely, 2^20007650 is an apocalyptic number.

20007650 is an abundant number, since it is smaller than the sum of its proper divisors (20070514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20007650 is a wasteful number, since it uses less digits than its factorization.

20007650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30806 (or 30801 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20007650 is about 4472.9911692289. The cubic root of 20007650 is about 271.4763660724.

Adding to 20007650 its reverse (5670002), we get a palindrome (25677652).

The spelling of 20007650 in words is "twenty million, seven thousand, six hundred fifty".