20180933 has 2 divisors, whose sum is σ = 20180934. Its totient is φ = 20180932.

The previous prime is 20180879. The next prime is 20180971. The reversal of 20180933 is 33908102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19166884 + 1014049 = 4378^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 20180933 - 2¹⁶ = 20115397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20180533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10090466 + 10090467.

It is an arithmetic number, because the mean of its divisors is an integer number (10090467).

Almost surely, 2^20180933 is an apocalyptic number.

It is an amenable number.

20180933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20180933 is an equidigital number, since it uses as much as digits as its factorization.

20180933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20180933 is about 4492.3193341525. The cubic root of 20180933 is about 272.2578518283.

The spelling of 20180933 in words is "twenty million, one hundred eighty thousand, nine hundred thirty-three".