20633677 has 12 divisors (see below), whose sum is σ = 22157436. Its totient is φ = 19206720.

The previous prime is 20633663. The next prime is 20633729. The reversal of 20633677 is 77633602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 19766916 = 931^2 + 4446^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20633677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20633617) by changing a digit.

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, 21553 + ... + 22489.

It is an arithmetic number, because the mean of its divisors is an integer number (1846453).

Almost surely, 2^20633677 is an apocalyptic number.

It is an amenable number.

20633677 is a deficient number, since it is larger than the sum of its proper divisors (1523759).

20633677 is an equidigital number, since it uses as much as digits as its factorization.

20633677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 34.

The square root of 20633677 is about 4542.4307369513. The cubic root of 20633677 is about 274.2787801421.

The spelling of 20633677 in words is "twenty million, six hundred thirty-three thousand, six hundred seventy-seven".