20633768 has 8 divisors (see below), whose sum is σ = 38688330. Its totient is φ = 10316880.

The previous prime is 20633747. The next prime is 20633771. The reversal of 20633768 is 86733602.

It can be written as a sum of positive squares in only one way, i.e., 14273284 + 6360484 = 3778^2 + 2522^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289603 + ... + 1289618.

Almost surely, 2^20633768 is an apocalyptic number.

It is an amenable number.

20633768 is a deficient number, since it is larger than the sum of its proper divisors (18054562).

20633768 is a wasteful number, since it uses less digits than its factorization.

20633768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579227 (or 2579223 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20633768 is about 4542.4407536037. The cubic root of 20633768 is about 274.2791833556.

The spelling of 20633768 in words is "twenty million, six hundred thirty-three thousand, seven hundred sixty-eight".