20859733 has 2 divisors, whose sum is σ = 20859734. Its totient is φ = 20859732.

The previous prime is 20859721. The next prime is 20859737. The reversal of 20859733 is 33795802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11168964 + 9690769 = 3342^2 + 3113^2 .

It is a cyclic number.

It is not a de Polignac number, because 20859733 - 2¹³ = 20851541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20859692 and 20859701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20859737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10429866 + 10429867.

It is an arithmetic number, because the mean of its divisors is an integer number (10429867).

Almost surely, 2^20859733 is an apocalyptic number.

It is an amenable number.

20859733 is a deficient number, since it is larger than the sum of its proper divisors (1).

20859733 is an equidigital number, since it uses as much as digits as its factorization.

20859733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 20859733 is about 4567.2456688906. The cubic root of 20859733 is about 275.2767813873.

The spelling of 20859733 in words is "twenty million, eight hundred fifty-nine thousand, seven hundred thirty-three".