20700650 has 12 divisors (see below), whose sum is σ = 38503302. Its totient is φ = 8280240.

The previous prime is 20700643. The next prime is 20700677. The reversal of 20700650 is 5600702.

It can be written as a sum of positive squares in 3 ways, for example, as 19811401 + 889249 = 4451^2 + 943^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 206957 + ... + 207056.

Almost surely, 2^20700650 is an apocalyptic number.

20700650 is a deficient number, since it is larger than the sum of its proper divisors (17802652).

20700650 is a wasteful number, since it uses less digits than its factorization.

20700650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414025 (or 414020 counting only the distinct ones).

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

The square root of 20700650 is about 4549.7966987548. The cubic root of 20700650 is about 274.5752119432.

The spelling of 20700650 in words is "twenty million, seven hundred thousand, six hundred fifty".