20733641 has 2 divisors, whose sum is σ = 20733642. Its totient is φ = 20733640.

The previous prime is 20733631. The next prime is 20733677. The reversal of 20733641 is 14633702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10627600 + 10106041 = 3260^2 + 3179^2 .

It is a cyclic number.

It is not a de Polignac number, because 20733641 - 2¹⁸ = 20471497 is a prime.

It is a Chen prime.

It is equal to p_1314188 and since 20733641 and 1314188 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20733641.

It is not a weakly prime, because it can be changed into another prime (20733631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10366820 + 10366821.

It is an arithmetic number, because the mean of its divisors is an integer number (10366821).

Almost surely, 2^20733641 is an apocalyptic number.

It is an amenable number.

20733641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20733641 is an equidigital number, since it uses as much as digits as its factorization.

20733641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20733641 is about 4553.4208019905. The cubic root of 20733641 is about 274.7209996815.

The spelling of 20733641 in words is "twenty million, seven hundred thirty-three thousand, six hundred forty-one".