20733337 has 2 divisors, whose sum is σ = 20733338. Its totient is φ = 20733336.

The previous prime is 20733259. The next prime is 20733359. The reversal of 20733337 is 73333702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16777216 + 3956121 = 4096^2 + 1989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20733337 is a prime.

It is not a weakly prime, because it can be changed into another prime (20733137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10366668 + 10366669.

It is an arithmetic number, because the mean of its divisors is an integer number (10366669).

Almost surely, 2^20733337 is an apocalyptic number.

It is an amenable number.

20733337 is a deficient number, since it is larger than the sum of its proper divisors (1).

20733337 is an equidigital number, since it uses as much as digits as its factorization.

20733337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 28.

The square root of 20733337 is about 4553.3874203718. The cubic root of 20733337 is about 274.7196570070.

The spelling of 20733337 in words is "twenty million, seven hundred thirty-three thousand, three hundred thirty-seven".