20650516 has 12 divisors (see below), whose sum is σ = 36170260. Its totient is φ = 10316160.

The previous prime is 20650507. The next prime is 20650519. The reversal of 20650516 is 61505602.

It can be written as a sum of positive squares in 2 ways, for example, as 8678916 + 11971600 = 2946^2 + 3460^2 .

It is a super-2 number, since 2×20650516² = 852887622132512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20650519) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7450 + ... + 9838.

Almost surely, 2^20650516 is an apocalyptic number.

It is an amenable number.

20650516 is a deficient number, since it is larger than the sum of its proper divisors (15519744).

20650516 is a wasteful number, since it uses less digits than its factorization.

20650516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4554 (or 4552 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 20650516 is about 4544.2838819774. The cubic root of 20650516 is about 274.3533721880.

The spelling of 20650516 in words is "twenty million, six hundred fifty thousand, five hundred sixteen".