20733081 has 8 divisors (see below), whose sum is σ = 29270304. Its totient is φ = 13008960.

The previous prime is 20733073. The next prime is 20733103. The reversal of 20733081 is 18033702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20733081 - 2³ = 20733073 is a prime.

It is a super-2 number, since 2×20733081² = 859721295505122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20733481) 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 7 ways as a sum of consecutive naturals, for example, 203215 + ... + 203316.

It is an arithmetic number, because the mean of its divisors is an integer number (3658788).

Almost surely, 2^20733081 is an apocalyptic number.

It is an amenable number.

20733081 is a deficient number, since it is larger than the sum of its proper divisors (8537223).

20733081 is a wasteful number, since it uses less digits than its factorization.

20733081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406551.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20733081 is about 4553.3593093451. The cubic root of 20733081 is about 274.7185263236.

Adding to 20733081 its reverse (18033702), we get a palindrome (38766783).

The spelling of 20733081 in words is "twenty million, seven hundred thirty-three thousand, eighty-one".