20120733 has 6 divisors (see below), whose sum is σ = 29063294. Its totient is φ = 13413816.

The previous prime is 20120729. The next prime is 20120743. The reversal of 20120733 is 33702102.

It can be written as a sum of positive squares in only one way, i.e., 13860729 + 6260004 = 3723^2 + 2502^2 .

It is not a de Polignac number, because 20120733 - 2² = 20120729 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117810 + ... + 1117827.

Almost surely, 2^20120733 is an apocalyptic number.

It is an amenable number.

20120733 is a deficient number, since it is larger than the sum of its proper divisors (8942561).

20120733 is a wasteful number, since it uses less digits than its factorization.

20120733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235643 (or 2235640 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20120733 is about 4485.6140047935. The cubic root of 20120733 is about 271.9868658955.

Adding to 20120733 its reverse (33702102), we get a palindrome (53822835).

The spelling of 20120733 in words is "twenty million, one hundred twenty thousand, seven hundred thirty-three".