20381733 has 16 divisors (see below), whose sum is σ = 30767040. Its totient is φ = 13330512.

The previous prime is 20381731. The next prime is 20381741. The reversal of 20381733 is 33718302.

It is not a de Polignac number, because 20381733 - 2¹ = 20381731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20381697 and 20381706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381731) 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, 5691 + ... + 8552.

It is an arithmetic number, because the mean of its divisors is an integer number (1922940).

Almost surely, 2^20381733 is an apocalyptic number.

It is an amenable number.

20381733 is a deficient number, since it is larger than the sum of its proper divisors (10385307).

20381733 is a wasteful number, since it uses less digits than its factorization.

20381733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14305 (or 14299 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20381733 is about 4514.6132724742. The cubic root of 20381733 is about 273.1578606386.

The spelling of 20381733 in words is "twenty million, three hundred eighty-one thousand, seven hundred thirty-three".