20634650 has 24 divisors (see below), whose sum is σ = 38820060. Its totient is φ = 8159360.

The previous prime is 20634643. The next prime is 20634697. The reversal of 20634650 is 5643602.

It can be written as a sum of positive squares in 6 ways, for example, as 2393209 + 18241441 = 1547^2 + 4271^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2132 + ... + 6768.

Almost surely, 2^20634650 is an apocalyptic number.

20634650 is a deficient number, since it is larger than the sum of its proper divisors (18185410).

20634650 is a wasteful number, since it uses less digits than its factorization.

20634650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738 (or 4733 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 20634650 is about 4542.5378369365. The cubic root of 20634650 is about 274.2830913636.

The spelling of 20634650 in words is "twenty million, six hundred thirty-four thousand, six hundred fifty".