20629763 has 32 divisors (see below), whose sum is σ = 27648000. Its totient is φ = 14908320.

The previous prime is 20629751. The next prime is 20629783. The reversal of 20629763 is 36792602.

It is a happy number.

It is a Cunningham number, because it is equal to 4542²-1.

It is not a de Polignac number, because 20629763 - 2⁴ = 20629747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20629703) 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 31 ways as a sum of consecutive naturals, for example, 86198 + ... + 86436.

It is an arithmetic number, because the mean of its divisors is an integer number (864000).

Almost surely, 2^20629763 is an apocalyptic number.

20629763 is a deficient number, since it is larger than the sum of its proper divisors (7018237).

20629763 is a wasteful number, since it uses less digits than its factorization.

20629763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 20629763 is about 4541.9998899163. Note that the first 3 decimals coincide. The cubic root of 20629763 is about 274.2614364078.

The spelling of 20629763 in words is "twenty million, six hundred twenty-nine thousand, seven hundred sixty-three".