20533768 has 16 divisors (see below), whose sum is σ = 39044160. Its totient is φ = 10122000.

The previous prime is 20533763. The next prime is 20533787. The reversal of 20533768 is 86733502.

It is not an unprimeable number, because it can be changed into a prime (20533763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17508 + ... + 18643.

It is an arithmetic number, because the mean of its divisors is an integer number (2440260).

Almost surely, 2^20533768 is an apocalyptic number.

It is an amenable number.

20533768 is a deficient number, since it is larger than the sum of its proper divisors (18510392).

20533768 is a wasteful number, since it uses less digits than its factorization.

20533768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36228 (or 36224 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 20533768 is about 4531.4200864630. The cubic root of 20533768 is about 273.8353744960.

The spelling of 20533768 in words is "twenty million, five hundred thirty-three thousand, seven hundred sixty-eight".