20385733 has 16 divisors (see below), whose sum is σ = 21772800. Its totient is φ = 19062400.

The previous prime is 20385731. The next prime is 20385763. The reversal of 20385733 is 33758302.

It is a cyclic number.

It is not a de Polignac number, because 20385733 - 2¹ = 20385731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20385695 and 20385704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20385731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136743 + ... + 136891.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^20385733 is an apocalyptic number.

It is an amenable number.

20385733 is a deficient number, since it is larger than the sum of its proper divisors (1387067).

20385733 is a wasteful number, since it uses less digits than its factorization.

20385733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 20385733 is about 4515.0562565709. The cubic root of 20385733 is about 273.1757289257.

The spelling of 20385733 in words is "twenty million, three hundred eighty-five thousand, seven hundred thirty-three".