20833949 has 2 divisors, whose sum is σ = 20833950. Its totient is φ = 20833948.

The previous prime is 20833931. The next prime is 20833957. The reversal of 20833949 is 94933802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13271449 + 7562500 = 3643^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 20833949 - 2⁸ = 20833693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20833909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10416974 + 10416975.

It is an arithmetic number, because the mean of its divisors is an integer number (10416975).

Almost surely, 2^20833949 is an apocalyptic number.

It is an amenable number.

20833949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20833949 is an equidigital number, since it uses as much as digits as its factorization.

20833949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 20833949 is about 4564.4220882824. The cubic root of 20833949 is about 275.1633145632.

The spelling of 20833949 in words is "twenty million, eight hundred thirty-three thousand, nine hundred forty-nine".